Yesterday, one of my 9th-grade students ask me a simple question based on common sense. But that was really an interesting question so I just wanted to share that question with all of you And to motivate all steemians I'm putting the bounty on the answers of the question given by everyone.
Another reason for this post is because I wanted to test the site steem-bounty and if it'll be helpful for the new user then be ready for the coming bounties.
QUESTION
So my student question was: If we want to see the moon then we look upward but why is it that if we are standing on the surface of the moon and want to see the earth then we still look upward.
I'm putting a bounty of 2 steems on my post. So Participate and win by just answering the simple question.
Rules:
1- Comment your answer below
2- Follow me and upvote this post
I think an image is better than many words...:)))
Really a good reply from your side. This picture is also simple so I can show it to students to simplify things.
I would be very proud if you will do it! You know i am a father of 4 years old child and he need very clear answer when he start to ask me "why this is like this....", you know what i mean...:)))
It's all because of gravity. Whenever we are standing on either the surface of moon or Earth we think that we are standing straight.
So my the observer is standing on the Earth he will think is standing straight on the surface of Earth and will look upward to see moon.
Same goes for the moon. When the observer is on the surface of moon then just like Earth if he look downward then he can only see the surface where he is standing but if he want to see the Earth then he should look upward.
I think it is the explanation you can give your 9th grade student so he can understand it in the most easiest way.
If you are on the moon, it is same as you are on earth. the surface of moon/earth is your reference plane & you are standing on it, due to gravity. You have to look up to see earth.
Thank You!
@automation @banjo @cleverbot
How can we stop the war in Yugoslavia?
I miss him.
you are standing space and in space there is no up and down.
don't laugh ooo, even me am now confused. 😀😁😂😃😄😅😆
I suppose it all depends on your position on the moon. The one side will not be visible for viewing earth as it is on the dark side facing the rest of space.
I presume it would be similar to here as you are standing on the moon's surface and would have to look up into the sky/space to see earth.
The moon continually revolves around the earth
And at certain times our point of position on the earth and moon differs ...it makes it possible viewing upwards for the earth from the moon
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If it’s nighttime (which lasts for two weeks) and you’re on the far side of the moon - then you’ll see a pitch black sky studded with more stars than you’ve ever seen. Depending on the time of year - you’ll also get an astounding view of the Milky Way as a faint “splash” of white light across most of the sky.
If it’s nighttime and you’re on the “near” side of the moon - then the view will be kinda similar - except that it’ll be dominated by the Earth - which will go through phases over 28 days just like the moon does from our perspective. The Earth won’t track across the sky though - it’ll remain in almost the exact same position all the time. You’ll see the Earth spinning slowly on it’s axis - moving at half the speed of the hour hand on a clock. You’d be able to tell the time just by watching which continents you can see!
If it’s daytime on the moon (which lasts for two weeks) then the sun will be the brightest you’ve ever seen it - and against a sky that is still completely black. The brightness of the sun and the lunar landscape will likely dazzle your eyes and make the stars much harder to see than you might expect - but you’ll still see stars when you look away from the sun and up into the sky and give your eyes time to adapt. And (as described above) the Earth will be ever-present if you’re on the near side of the moon - or never visible if you’re on the far side. But you’ll never see a “full Earth” - it’ll always be a crescent or a “new” Earth (like a “new moon”. If you’re really lucky - you’ll see a solar eclipse - with the Earth blocking your view of the sun.
In all cases, the Earth will look MUCH bigger than the sun or the moon does from here on Earth.
The earth continually revolves around the solar systems, so to get a view of a circular movement the best thing to do is look at it from the top.
If it’s nighttime (which lasts for two weeks) and you’re on the far side of the moon - then you’ll see a pitch black sky studded with more stars than you’ve ever seen. Depending on the time of year - you’ll also get an astounding view of the Milky Way as a faint “splash” of white light across most of the sky.
If it’s nighttime and you’re on the “near” side of the moon - then the view will be kinda similar - except that it’ll be dominated by the Earth - which will go through phases over 28 days just like the moon does from our perspective. The Earth won’t track across the sky though - it’ll remain in almost the exact same position all the time. You’ll see the Earth spinning slowly on it’s axis - moving at half the speed of the hour hand on a clock. You’d be able to tell the time just by watching which continents you can see!
If it’s daytime on the moon (which lasts for two weeks) then the sun will be the brightest you’ve ever seen it - and against a sky that is still completely black. The brightness of the sun and the lunar landscape will likely dazzle your eyes and make the stars much harder to see than you might expect - but you’ll still see stars when you look away from the sun and up into the sky and give your eyes time to adapt. And (as described above) the Earth will be ever-present if you’re on the near side of the moon - or never visible if you’re on the far side. But you’ll never see a “full Earth” - it’ll always be a crescent or a “new” Earth (like a “new moon”. If you’re really lucky - you’ll see a solar eclipse - with the Earth blocking your view of the sun.
In all cases, the Earth will look MUCH bigger than the sun or the moon does from here on Earth.
Earth and Moon being a spherical object, when we stand on the surface of it, we would have to see up in order to see an object that is perpendicularly opposite to it.
But further depending on where you are exactly on earth would determine if you can see it exactly above you or at some angle above you.
Just like if we need to send a shuttle to moon, it would be thrown in upwards direction, similarly we need to see in an upwards direction to see a spherical item when we are ourselves standing on a spherical object.
No offense to your student, but that isn't really true, I understand that on earth most of the places you only need to look upwards, but on the moon you might not even be able to see earth at all, it depends on where you landed. I guess that's what movies do to us!
You as the person are attached to the ground by the force of gravity and therefore your perspective of objects not on your level of eye site will always be at a view of looking u. However, with the moon, it can be slightly different as it is smaller than the earth you could travel to a part of the moon where the earth is in a view from eye level so you wouldn't in fact be looking up by virtue of bending your neck.
Its weird to think the defining factor in this argument would be your neck muscles tilting your head, seems a bit arrogant thinking we are the factor in relation to two things much larger, but good question from the kid, I like inquestive midns that ask questions
The deffinition of "up" is a relationship to the body exerting the greatest gravity to the observer. So to look up from both earth and the moon wpuld be to look 180 degrees from center mass.
Now technicaly you dont always have to look up to view the moon and likewise the earth from the moon. You can, when the relative possition is right, look forword
It depends on which part of moon you are landing. If you are on dark side of moon, your sky wont be having our earth. If you are on earth side of moon, You have to see up. And if you are on equator of this two poles, You will see earth near your horizon.
My student question was about "why we always look upward"
My apology if my question wasn't clear for you.
I hope this was not a science question :) I think this was how human react. We always look up to see things. Space object always on top of us. Irregardless moon, sun, star or earth. So wherever we located, we still need to look up in order to see the space. This was my humble answer.
Yes, I know. But I was happy because at least students were thinking creatively.
If you look down all you will see is your shoes (if they are tied to the surface, so you're not floating around because of zero-gravity)
astronots didnt have to look 90degrees up to see the earth which was strange, they landed in the quite center of it.
Well, i think cuz of gravity, it sticks you to the surface your at, and as the moon rotates around the earth you just need to look at the direction place you look at earth, its like a mirror, or your shadow!
Relatively speaking both bodies area distance away from each other. Do you have to look in the distance which usually dotorts the displacement of another body. Just guessing. Soinds logical. I could be wrong!!
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