Phobos's orbit and its apparent motion across the Martian sky
1–10 of 50 posts
Re: Phobos's orbit and its apparent motion across the Martian sky
#2I feel like this would be best illustrated by a KSP mod.
Re: Phobos's orbit and its apparent motion across the Martian sky
#3I feel like this would be best illustrated by a KSP mod.
Or an Orbiter mod.
Re: Phobos's orbit and its apparent motion across the Martian sky
#4That's no moon
Re: Phobos's orbit and its apparent motion across the Martian sky
#5This is a whole lotta words and graphics to explain something that literally takes two sentences:
Phobos orbits Mars faster than Mars rotates itself, while Deimos rotates slower than Mars. Thus from the ground their apparent motion is opposing in the sky; Deimos rises in the east and sets in the west, while Phobos does the opposite.
Done.
Re: Phobos's orbit and its apparent motion across the Martian sky
#6This is a whole lotta words and graphics to explain something that literally takes two sentences: Phobos orbits Mars faster than Mars rotates itself, while Deimos rotates slower than Mars. Thus from the ground their apparent motion is opposing in the sky; Deimos rises in the east and sets in the west, while Phobos does the opposite. Done.
This
Earth has many artificial satellites that do that.
Re: Phobos's orbit and its apparent motion across the Martian sky
#7This is a whole lotta words and graphics to explain something that literally takes two sentences: Phobos orbits Mars faster than Mars rotates itself, while Deimos rotates slower than Mars. Thus from the ground their apparent motion is opposing in the sky; Deimos rises in the east and sets in the west, while Phobos does the opposite. Done.
I thought it was an interesting article. Also, your comment breaks the guidelines:
> Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something.
Re: Phobos's orbit and its apparent motion across the Martian sky
#8What I find unsettling is that our Moon rotates at a the precise perfect speed to make us "see always the same side". From all the possible speed values in the universe, why precisely that one?!
Re: Phobos's orbit and its apparent motion across the Martian sky
#9This is a whole lotta words and graphics to explain something that literally takes two sentences: Phobos orbits Mars faster than Mars rotates itself, while Deimos rotates slower than Mars. Thus from the ground their apparent motion is opposing in the sky; Deimos rises in the east and sets in the west, while Phobos does the opposite. Done.
Reminds me of a flight I had from the Nordics to California in winter. Because of the latitude, the plane was flying faster than the rotation of the earth. The flight left in the morning, so I got to watch the sun set in the east.
Re: Phobos's orbit and its apparent motion across the Martian sky
#10This is a whole lotta words and graphics to explain something that literally takes two sentences: Phobos orbits Mars faster than Mars rotates itself, while Deimos rotates slower than Mars. Thus from the ground their apparent motion is opposing in the sky; Deimos rises in the east and sets in the west, while Phobos does the opposite. Done.
I thought it was an interesting article. Also, your comment breaks the guidelines: > Please don't post shallow dismissals, especially of other people's work. A good critical comment teaches us something. https://news.ycombinator.com/newsguidelines.html
I think that’s shallow dismissal as in disagreement without substance, I.e. not adding much to an argument. Not dismissal as in a brief summary so you don’t need to read the rest.