Mars and earth question

[supernova1965]

What would Earth look like from Mars. I am reading the John Carter of Mars series by Edgar Rice Buroghs and in it John talks of seeing Earth in the sky how big would it look naked eye and what could you see through a scope or bino's:question:

[LAW]

Probably very similar to how Venus looks in our sky. Comparable size and distance apart, maybe a slightly difference colour.

[astroron]

Warren Google it, there are NASA pictures on the net of Earth from Mars ,
Cheers:thumbsup:

[supernova1965]

Thanks for that makes sense



Thanks Ron will do it right now:thumbsup:

[malclocke]

Mars has a radius of around 3000km, about half that of the Earth. So Earth would appear around twice the size that Mars does to us through a comparable telescope.

You would have the problem on Mars that on closest approach the Earth would be in line with the Sun, so you would not be able to observe it. You would have to wait for a transit of Earth to see the Earth silhouetted against the Sun to see it at its largest.

It would appear as a morning and evening 'star' much the same as Venus does to us, so you would never see it directly overhead. I expect you would have slightly better seeing than from Earth as the atmosphere is thinner. Hard to say what kind of details you would see on the surface, photos from space probes show definite blue and white detail, so I expect you would be able to see some.

Your real problem would be downloading RegiStax to process your images, as the bandwidth to Earth is shocking. And don't even think about uploading the fruits of your labours to this forum over Martian ADSL.

[Barrykgerdes]

Install Stellarium

Select Mars
press ctrl G to fly there
Select Earth (turn the ground off if necessary)

select an ocular and a telescope (pick a combination that will give you about 400x magnification
and see what mars would look like from earth

Press shift/alt ] to advance the time by a month at a time and watch its size wax and wane and see it disappear at its closest approach.

Barry

[Regulus]

Did u find the picture Warren? From memory it has a blue tinge to the reflected light just as mars has a red one. It would be a very attractive 'star' to see.

[supernova1965]

Thanks Mal love the adsl line


Thanks Barry I will do that I can't wait for stellarium for iPad Iheard there was one but wasn't sure if it was anygood as I heard that it wasn't your team that did it.

Hi Regulus I haven't been able to as the inlaws are here enough said I think.

[bartman]

Here you go Warren.......
http://www.youtube.com/watch?v=zAcsoTBWd7w
Saw this on spacebook....I think ( and I cant remember where or who posted it, but I think it might have been Carl)
Bartman

[supernova1965]

Thanks Bart heading there now

Very funny you got me