Existence of a celestial body big enough for early civilization to be thought of as a second moon ...
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Existence of a celestial body big enough for early civilization to be thought of as a second moon
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$begingroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
edited Mar 18 at 0:21
Willk
116k27219486
asked Mar 17 at 21:19
shootshishootshi
535
$endgroup$
|
show 1 more comment
$begingroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
edited Mar 18 at 0:21
Willk
116k27219486
asked Mar 17 at 21:19
shootshishootshi
535
$endgroup$
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
Mar 17 at 21:43
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
Mar 17 at 22:20
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
Mar 17 at 22:27
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
Mar 17 at 22:50
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
Mar 18 at 1:06
|
show 1 more comment
$begingroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
edited Mar 18 at 0:21
Willk
116k27219486
asked Mar 17 at 21:19
shootshishootshi
535
$endgroup$
Is there a possible scenario in which once a year a celestial body can be seen from the surface of the Earth-like planet for a short period of time?
- With it being big enough for early civilization to consider it a second moon but much smaller than the actual one.
- And occurring each year for one thousand years.
I thought two moons questions are similar enough, but I haven't found a proper answer for myself.
Thank you!
space earth-like
space earth-like
edited Mar 18 at 0:21
Willk
116k27219486
asked Mar 17 at 21:19
shootshishootshi
535
edited Mar 18 at 0:21
Willk
116k27219486
asked Mar 17 at 21:19
shootshishootshi
535
edited Mar 18 at 0:21
Willk
116k27219486
edited Mar 18 at 0:21
Willk
116k27219486
edited Mar 18 at 0:21
Willk
116k27219486
116k27219486
asked Mar 17 at 21:19
shootshishootshi
535
asked Mar 17 at 21:19
shootshishootshi
535
asked Mar 17 at 21:19
shootshishootshi
535
535
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
Mar 17 at 21:43
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
Mar 17 at 22:20
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
Mar 17 at 22:27
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
Mar 17 at 22:50
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
Mar 18 at 1:06
|
show 1 more comment
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
Mar 17 at 21:43
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
Mar 17 at 22:20
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
Mar 17 at 22:27
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
Mar 17 at 22:50
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
Mar 18 at 1:06
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
Mar 17 at 21:43
$begingroup$
Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
$endgroup$
– StephenG
Mar 17 at 21:43
1
1
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
Mar 17 at 22:20
$begingroup$
Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
$endgroup$
– JBH
Mar 17 at 22:20
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
Mar 17 at 22:27
$begingroup$
@StephenG true, but not all of them were considered moons.
$endgroup$
– shootshi
Mar 17 at 22:27
3
3
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
Mar 17 at 22:50
$begingroup$
Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
$endgroup$
– JBH
Mar 17 at 22:50
2
2
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
Mar 18 at 1:06
$begingroup$
Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
$endgroup$
– Agrajag
Mar 18 at 1:06
|
show 1 more comment
2 Answers
2
active
oldest
votes
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
$endgroup$
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
Mar 18 at 1:38
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
Mar 18 at 16:04
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
Mar 19 at 7:08
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
Mar 19 at 16:15
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered Mar 17 at 23:51
WillkWillk
116k27219486
$endgroup$
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
Mar 18 at 7:38
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
$endgroup$
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
Mar 18 at 1:38
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
Mar 18 at 16:04
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
Mar 19 at 7:08
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
Mar 19 at 16:15
add a comment |
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
$endgroup$
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
Mar 18 at 1:38
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
Mar 18 at 16:04
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
Mar 19 at 7:08
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
Mar 19 at 16:15
add a comment |
$begingroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
$endgroup$
Yes. That would be a kind of quasi-satellite.
And Earth already has a small one - it's called Cruithne. At perigee, a larger Cruithne might well be visible, always in the same section of the sky.
A larger body would be less stable, but if you only need one thousand years, I think it could work out.
As rightfully pointed out by Ville Niemi, in this context "less stable" might have very, very dire consequences - you might be looking at a Theia-like endgame. Emphasis on the "end".
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
edited Mar 18 at 7:30
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
answered Mar 17 at 21:41
LSerniLSerni
29.7k25394
29.7k25394
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
Mar 18 at 1:38
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
Mar 18 at 16:04
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
Mar 19 at 7:08
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
Mar 19 at 16:15
add a comment |
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
Mar 18 at 1:38
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
Mar 18 at 16:04
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
Mar 19 at 7:08
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
Mar 19 at 16:15
5
5
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
Mar 18 at 1:38
$begingroup$
Just wanted to point out this despite it not being in the question. I think the "failure mode" for this solution would be pretty bad. I mean, if I had bought this solution from a world building agency I would want my money back or at least very good insurance for my civilization bundled in the deal.
$endgroup$
– Ville Niemi
Mar 18 at 1:38
1
1
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
Mar 18 at 16:04
$begingroup$
@VilleNiemi, is there such a real thing as a "world building agency", or is that just a Douglas Adams style joke?
$endgroup$
– EveryBitHelps
Mar 18 at 16:04
1
1
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
Mar 19 at 7:08
$begingroup$
@EveryBitHelps Obviously building planet scale objects to specification requires highly specialized equipment and expertise. Simple economics requires it is handled by an organization specialized in it.
$endgroup$
– Ville Niemi
Mar 19 at 7:08
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
Mar 19 at 16:15
$begingroup$
@VilleNiemi damn, here I though there where some ppl offering dedicated wb services to help with our geeky hobbies! Besides those of us here on wb.se.
$endgroup$
– EveryBitHelps
Mar 19 at 16:15
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered Mar 17 at 23:51
WillkWillk
116k27219486
$endgroup$
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
Mar 18 at 7:38
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered Mar 17 at 23:51
WillkWillk
116k27219486
$endgroup$
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
Mar 18 at 7:38
add a comment |
$begingroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered Mar 17 at 23:51
WillkWillk
116k27219486
$endgroup$
A comet could fill this role. Comets are notoriously bright.
https://en.wikipedia.org/wiki/File:Comet_P1_McNaught02_-_23-01-07.jpg
I like the tail but you could have your celestial body be made of something more solid, equally reflective, but not falling apart and leaving the tail.
Comets also have very elliptical orbits and visit infrequently. In this list of periodic comets, 3200 Phaeton has a period of 1.4 years - very short by comet standards.
https://en.wikipedia.org/wiki/3200_Phaethon
So: your second moon is a very bright short period comet. That seems plausible.
answered Mar 17 at 23:51
WillkWillk
116k27219486
answered Mar 17 at 23:51
WillkWillk
116k27219486
answered Mar 17 at 23:51
WillkWillk
116k27219486
answered Mar 17 at 23:51
WillkWillk
116k27219486
116k27219486
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This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
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– LSerni
Mar 18 at 7:38
add a comment |
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This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
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– LSerni
Mar 18 at 7:38
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
Mar 18 at 7:38
$begingroup$
This could work, but probably not for very long - a short period comet would have less volatiles, and likely not last for one thousand years (and a large comet would be less stable). But yes, especially if it came from outside the ecliptic, it would be plausible and is a much better solution than a 'quasi-satellite'. ( thenakedscientists.com/articles/questions/… )
$endgroup$
– LSerni
Mar 18 at 7:38
add a comment |
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Humans considered all celestial bodies to be going around the Earth until a chap named Copernicus (and some of his contemporaries) suggested otherwise. I doubt the size would make a difference or periodicity.
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– StephenG
Mar 17 at 21:43
1
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Welcome to Worldbuilding.SE! We're glad you could join us! When you have a moment, please click here to learn more about our culture and take our tour. What do you mean by "occurring for 1,000 years"? Do you mean the moon is in the sky, visible and basically the same size, for a 1,000 year period, or that the inhabitants see it once every 1,000 years, like a comet?
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– JBH
Mar 17 at 22:20
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@StephenG true, but not all of them were considered moons.
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– shootshi
Mar 17 at 22:27
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Thanks, please edit your question with the clarification. Never depend on people reading through the comments to find clarifications. Cheers!
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– JBH
Mar 17 at 22:50
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Just to say, it is custom here to wait 24 hours after asking a question before awarding acceptance, otherwise it can discourage other, perhaps better answers - this policy benefits the comunity.
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– Agrajag
Mar 18 at 1:06