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Curiosity Sees 'Evening Star' Earth

mars earth moon curiosity rover

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#16    Waspie_Dwarf

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Posted 09 February 2014 - 11:49 PM

View PostLikely Guy, on 08 February 2014 - 11:42 PM, said:

That's way over an AU, which can't be right. It must be in kilometres.
Others have already given you the figures showing you that NASA is right. But why are they right and you wrong? Think about it for a moment. Think about the fact that Mars and Earth are orbiting the Sun at different speeds, taking different amounts of time to complete an orbit.

Has the answer come to you yet?

To clarify, Mars and Earth are not at fixed distances from each other. Think about the situation when Earth and Mars are opposite side of the Sun from Each other. Earth is 1 AU from the Sun. Mars is 1.52 AU from the Sun, but 2.52 AU from Earth.

So Mars can be more than 2.5 AU from Earth... do you still think the figure of 100 million miles is wrong?

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#17    Mike D boy

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Posted 10 February 2014 - 12:01 AM

Awesome...I always imagined how the Earth looks like from another planet like Mars with its' atmosphere. From a module named "Curiosity" indicates our own curiosity in space exploration. To look at Earth from the rest of our solar system's perspective: we're a tiny speck in the middle of this vast universe.

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#18    taniwha

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Posted 10 February 2014 - 01:54 AM

View PostLikely Guy, on 08 February 2014 - 11:42 PM, said:

Hey Waspie,

I don't want to nit-pick but the main page of UM (not the forum) says, "The rover has taken a picture to show what Earth looks like from more than 100 million miles away." That's way over an AU, which can't be right. It must be in kilometres.

I don't know who to contact to correct this. You could probably fix this quicker.

Lets face it,  its hard to mentally image the distance to the planets or even the clouds given an Earthbound perspective.  

Here is a handy tool I found just the other day.  Eliminates guess work and helps you surf the solar system.

Once in, click the top left icon and then use your cursor to manipulate Earths orbit for example, and the other planets follow  exactly how they can be observed in real space time in their relative past , present and future orbits.  Again use the cursor to learn distances to and from any planet you desire.  But youll have fun figuring it yourself.

http://www.redicecre...olarsystem.html :tu:


#19    taniwha

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Posted 10 February 2014 - 02:05 AM

P.S.  

Using the model I just rewound Earth orbit to Jan 31 2014 the supposed time of the Mars photo and discovered the distance meter between Earth and Mars was registering 1.06 Au.
.
This corresponds neatly to the news articles claim of 99 million miles.

P.P.S

Just worked out the calender feature.  Choose the exact date and time anywhere between 1900 AD and 2100 AD that you wish to observe the solar system.

Edited by taniwha, 10 February 2014 - 02:30 AM.


#20    joc

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Posted 10 February 2014 - 02:14 AM

I never really thought about how the Earth would look from another planet.    I suppose that is because I have never wondered what we would look like to Martians...because there aren't any Martians...but now...there is an Alien Earthling observing us from Mars.  That is very interesting!

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now i know that light is old and stars are cold

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#21    pallidin

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Posted 10 February 2014 - 04:35 AM

If you look really close, you can see me waving.  :yes: :w00t:

Edited by pallidin, 10 February 2014 - 04:36 AM.


#22    Calibeliever

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Posted 10 February 2014 - 04:51 PM

Great, now I have "Big Blue Marble in Space" from Schoolhouse Rock stuck in my head. Cool pic tho.


#23    TheGreatBeliever

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Posted 12 February 2014 - 06:32 AM

How do they control curiosity when its millions of miles away?


#24    TheGreatBeliever

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Posted 12 February 2014 - 10:09 AM

Sometimes i really wonder wat is at the other end of the universe..


#25    Waspie_Dwarf

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Posted 13 February 2014 - 01:14 PM

View PostTheGreatBeliever, on 12 February 2014 - 06:32 AM, said:

How do they control curiosity when its millions of miles away?

In these days of global telecommunications, cheap computers, pilotless drones and driverless cars I find it surprising, even a little shocking that someone even needs to ask this question.

Since the question has been asked...

Instruction are transmitted to Curiosity via the huge antennae of NASA's Deep Space Network. These will tell the rover where NASA wants it to drive too. Curiosity will use it's navigation cameras to surveyor the route, looking for obstacles. It's on-board computers will command it to avoid anything it perceives as hazardous. If it can not calculate a new route it will stop and await new orders.

"Space is big. Really big. You just won't believe how vastly, hugely, mind-boggingly big it is. I mean, you may think it's a long way down the street to the chemist, but that's just peanuts to space." - The Hitch-Hikers Guide to the Galaxy - Douglas Adams 1952 - 2001

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#26    MissJatti

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Posted 16 February 2014 - 11:34 AM

That is a Epson scanned copy of a real photo,
And the person forgot to wipe a cookie crum

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#27    Eldorado

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Posted 20 February 2014 - 02:03 PM

View Posttoast, on 09 February 2014 - 08:27 AM, said:

Source : http://www.stellarium.org/en/ (a must have, btw)
:yes:

Have you tried Celestia?
http://sourceforge.n...ource=directory






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