Ioannes
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  • Member for 1 year, 6 months
  • Last seen more than 1 year ago
Two luminous points disappearing in the sky
1 votes

I think James K is right, it might have been airplanes. It happened to me a few times that I saw one very bright yellowish and even brighter getting dot kind of in front of me, and as it came close ...

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Incidence angles of meteoroids
Accepted answer
1 votes

Horizontal atmospheric entries are unlikely because the object would have to almost miss the Earth and brush against it rather than impact it (and probably would disintegrate in the atmosphere if it's ...

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Is there a reason why the IAU differenciates objects in the SS orbiting the sun into a particular classification but it doesnt for satellites?
0 votes

Well, all planets, asteroids, comets and the like are satellites too, satellites of a star: the Sun. The term "moon" is used to define a satellite of a sub-stellar object only. You're right ...

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Where do we define the "surface" of a gas planet?
0 votes

Any other way to formally define the "surface" of a gas giant? Other than what Michael and AtmosphericPrisonEscape are proposing, you could also set the surface at the actual surface of ...

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Can Jupiter's nightside be classified as spectral type Y?
-1 votes

This Wikipedia page lists Jupiter as a disputed sub-brown dwarf because its mass reportedly is sufficient to qualify for one. Distance to another star like the Sun doesn't matter, nor does the ...

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Is Planet Nine observable in principle?
-4 votes

Of course; how would we find it otherwise? This is how we look for it: image one part of the sky with a telescope, about where the planet is presumed. At another time we image the same part again and ...

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