Milky Way Galaxy

100,000 light years across

nine

We only know a handfull of planets of all of planets in the Milky Way galaxy, but there are pretty bad planets even in our own solar system.

Mercury is so hot, that all life would die in there, if life would have ever been able to emerge there. Venus is too hot for life too, it's atmosphere is full of corroding acid rains and it's surface covered with numerous volcanoes. Earth is the only planet suitable for life in our solar system. Mars is dry and too cold for living, all of it's water is frozen in its polar caps and under the rocky surface. Mars doesn't have an atmosphere either, so there is no air to breathe and all the dangerous space radiation comes straight to its surface. Jupiter is completely inhabitable, as well as Saturn, Uranus and Neptune. All four are huge gas planets, they don't have a solid surface at all, only gas is surrouding their cores, and they are also so far away from the sun that they are very cold. Those planets many many times bigger than Earth also have immensely heavier gravity, which would crush a human body if it would stand on some surface. Also huge cyclonic storms are wandering on Jupiter and Neptune, the Jupiters "eye" storm is so big, it could swallow three whole Earths.

Pluto which used to be a planet, but is better to categorize as a planetoid since it's so very small, is only a tiny ice ball so far away that the sun doesn't look much different than the other stars on Plutos sky. So it's extremely cold place with eternal night.

There are still worse planets in the Universe and in Milky Way, every planet which doesn't have a sun, if their sun has gone to an end, are completely impossible for life to exist, since they don't have light, which makes all life possible. Also it would be pretty horrible to be on a planet which' sun would die as a red giant turning to a supernova and destroy the whole planet and every life form on it. Everything would burn, oceans boil and mountains melt and the planet would turn into a giant ball of lava until the supernova would blow everything away.

Milk + Space

It condenses and turns into vapour which is known as "steam".

Big. Very big.

Take a spectrum of the galaxy, and measure the difference in wavelength of spectral lines from the wavelengths of those same lines as measured in the laboratory

Solar System

The Milky Way probably has billions of planets; only about a thousand are known so far.

cooler particles are slower moving thus more dense. the more dense the material the further it will sink

Perspective

Since our galaxy is about 100,000 light-years side to side and we are about 30,000 light-years from the centre of our galaxy then by dividing 100,000 by 2 making it 50,000 and then minus 30,000 then it estimates we should be 20,000 light-years from the nearest edge of our galaxy.

The Milky Way galaxy will not melt or dissolve; it will continue to exist for billions of years. However, the Milky Way is on a collision course with the Andromeda galaxy, and they are expected to merge in about 4 billion years.

• Milky Way Galaxy
• Galaxy

"The halo primarily contains individual old stars and clusters of old stars ("globular clusters"). It may be over 130,000 light years across. The halo also contains "dark matter," which is material that we cannot see but whose gravitational force can be measured." to shorten the answer - individual stars, clusters, and dark matter.

That depends on how you define the "Milky Way". Technically, the "Milky Way" refers to a faint band of light that crosses the night sky. This band is how we see the star-dense disk of our galaxy from our vantage point inside that disk. Our galaxy was named for this band of light, and called the "Milky Way Galaxy". Note that the "Milky Way" and the "Milky Way Galaxy" refer to two different things. The answer also depends on what you mean by "stars in the sky". Do you mean the stars that can be seen from Earth? And if so, with the naked eye, or with a telecope? How powerful a telescope? Or do you mean every star that is "out there", i.e., every star in the universe, whether we can see it or not? I could sit here all day researching and entering answers to all the different ways this question could be interpreted. But I'm not going to waste that kind of time until you tell me what you are talking about. However, there is one way of interpreting this question that I already know the answer to, and I will give you that answer here. If the "Milky Way" means the galaxy, and if "stars in the sky" means stars visible, with the naked eye, from Earth's surface, then the answer is zero. There are no stars outside of our galaxy that are visible from here on Earth. There are a few "objects" outside our galaxy that are visible with the naked eye. But these objects are, for the most part, galaxies themselves, not individual stars. They are so far away that their immense masses appear to us as tiny pinpoints of light, indistinguishable from the true stars we can see. In fact, they are dimmer than most of the stars we can see. In all of the universe, I believe there is not a single individual star outside of our galaxy that is bright enough to be seen from Earth with the naked eye. But I may be wrong on that. There MAY be a couple of stars in one of the Magellanic Clouds that can be seen. But even if that is the case, the answer to the question is still, essentially, zero.

The Milky Way formed about 13.6 billion years ago from a huge cloud of gas and dust in space. As gravity pulled these materials together, they began to collapse and eventually formed the Milky Way galaxy that we see today. The Milky Way continues to evolve through the interactions of stars, gas, and dark matter within it.

Some points:

* France & Britain failed to resist the German reoccupation of the Rhineland * The great powers stayed out of the Spanish Civil War * France & Britain failed to resist the German invasion of Austria * France & Britain attempted to maintain European peace at the Munich Conference

* On 31 march 1939, France & Britain pledged to support Poland against a German attack * Nazi Germany & communist Russia signed a friendship/non-aggression pact in August 1939 * Between August & October of 1940 airmen from Britain, the commonwealth, France and Poland took on the Nazi airforce over the skies of Britian.

in milky way there are about 2,500 stars

it would take you approximately 100,000 years to travel across the milky way. happy traveling :-) !

Any direction away from the Earth's center Away from from Earth's center. In other words all directions.

This answer is wrong. The question is, in absolute terms, not relatively speaking, Which way is up?

If up is any direction away from the Earth's center, that would mean that , as admitted in the incorrect answer, up would be 360 times 360 different directions.

The correct answer is man has no idea what direction is up. Up cannot be 129,600 different directions which include directions which would be opposite to other directions.

The answer is man does not know which way is up.

Yes.

It is not like the Earth owns the Milky Way but some of us Earthlings call the galaxy in which the solar system resides (with the Earth) for The Milky Way [Swedes call it "Vintergatan" (the Winter Road)]

Milky Way: About 100,000 light-years in diameter

Universe: Unknown, but the observable Universe has a diameter of about 92 billion light-years.

Solar System: There are different definitions for the limits of the Solar System; if you include the Oort Cloud, you would have a diameter of about 4 light-years.

That's a radius of about 2 light years, taking you about half way to the nearest star.

With many other commonly used definitions, the "Solar System" is much smaller.