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2007-10-01 06:44:45 · 12 answers · asked by poi 2 in Science & Mathematics Astronomy & Space

Then, after a thousand years the stars that we see in our night sky won't be the same??? coz we are constantly moving???

2007-10-01 07:06:25 · update #1

12 answers

Nobody above gave the complete answer. Read books by astronomers Clube and Napier. They showed that the sun (and of course its family) oscillates up and down withing the spiral arm of the galaxy.

They site this in their argument that during these oscillations (which last hundreds of thousands of years) the sun moves through various concentrations of gases and dust, which may alter its energy output and may also cause disruptions in the Oort cloud of comets that surround the Solar System. These effects may account for dramatic climate changes over the Earth’s history, and also times when there were higher levels of cometary bombardment from space.

Good question. Read their books – they are written for general reading.

2007-10-01 08:37:09 · answer #1 · answered by nick s 6 · 1 1

Yes, the solar system moves around the galactic center. The entire galaxy itself is moving through space as well. And, yes, over time the stars in the sky will change, although it takes way more than 1,000 years for anything really noticeable to happen. That's because the distances between the stars is so great. Remember, the nearest star to ours is about 4.3 light years away. Light - traveling at 186,000 miles per SECOND, would take 4.3 years to get there (i.e. switch on a light here on earth, and people in a spaceship around Proxima Centauri wouldn't be able to see it for 4.3 years.

2007-10-01 07:09:40 · answer #2 · answered by Anonymous · 1 1

Our solar system is located pretty much out near the edge of the Milky Way, which is our galaxy. However, its location relative to the other stars in the neighborhood is constantly shifting. In fact, none of the stars in any galaxy is stationary with respect to each other.

That results because their are gravitational forces always at work to draw them together. And, in addition, there are always centripetal forces due to their motions tending to draw them apart. And all this began with the big bang when everything gained energy and consequent momentum. This balance or imbalance actually of the forces keeps them moving with respect to each other, the galactic centers, and any other frames of reference used.

Everything is moving in outer space. But because space is so vast, things rarely run into each other. But collisions do happen. Planets run into planets, stars run into stars, and galaxies run into galaxies. In fact, the near galaxy, Andromeda, is on a collision course with our Milky Way. But before you go out an buy collision insurance, be aware that the impact is not expected for several million years from now. [See source.]

2007-10-01 07:03:53 · answer #3 · answered by oldprof 7 · 0 1

Just remember that you're standing on a planet that's evolving
And revolving at nine hundred miles an hour,
That's orbiting at nineteen miles a second, so it's reckoned,
A sun that is the source of all our power.
The sun and you and me and all the stars that we can see
Are moving at a million miles a day
In an outer spiral arm, at forty thousand miles an hour,
Of the galaxy we call the 'Milky Way'.
Our galaxy itself contains a hundred billion stars.
It's a hundred thousand light years side to side.
It bulges in the middle, sixteen thousand light years thick,
But out by us, it's just three thousand light years wide.
We're thirty thousand light years from galactic central point.
We go 'round every two hundred million years,
And our galaxy is only one of millions of billions
In this amazing and expanding universe.
The universe itself keeps on expanding and expanding
In all of the directions it can whizz
As fast as it can go, at the speed of light, you know,
Twelve million miles a minute, and that's the fastest speed there is.
So remember, when you're feeling very small and insecure,
How amazingly unlikely is your birth,
And pray that there's intelligent life somewhere up in space,
'Cause there's bugger all down here on Earth.

2007-10-01 09:49:44 · answer #4 · answered by Anonymous · 1 0

We orbit the center of the Milkyway, about once every 237 million years.

The stars we see in the night sky are moving - quite rapidly - but the distances are so great that we see them as being fairly stationary. In 10,000 years, the night sky will have changed from as we see it today.

2007-10-01 08:00:28 · answer #5 · answered by quantumclaustrophobe 7 · 0 0

Everything is always moving. Our planets around the sun, our solar system around the galaxy and the galaxy is moving through our universe.

Everything in our galaxy is rotating around it's center all while the galaxy is drifting out from the 'center' of the universe which would refer back to the 'big bang'. It takes would galaxy (the milkyway) about 240 million years to complete a revolution.

hope this helps

2007-10-01 06:52:19 · answer #6 · answered by aero 2 · 1 1

Well we are in one of the arms of the milky way spiral galaxy, so we are definitely moving in relation to the center of our galaxy and every other object in the sky for that matter.

2007-10-01 06:48:17 · answer #7 · answered by Brian K² 6 · 1 1

Hi. Yes. The galaxy revolves about once every 240 million years.

2007-10-01 06:50:40 · answer #8 · answered by Cirric 7 · 2 1

Yes it does

2007-10-01 07:12:27 · answer #9 · answered by Purple 1 · 0 1

Every thing is in orbit or it will fall into the sun or black hole.

2007-10-01 07:07:27 · answer #10 · answered by JOHNNIE B 7 · 0 1

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