What star lies 2000 light years from earth?

Answer 1

Difficult to know for sure, but the low end of the estimate is around 200 billion stars. We can't be certain, because we cannot see most of the "red dwarf" stars, stars that are smaller than about 10% of the mass of our Sun.

Just to give you some idea of the problem, the CLOSEST star to our Sun is a red dwarf called Proxima Centauri, which is about 4.2 light-years away. But even though it is the closest, Proxima Centauri cannot be seen with the naked eye! It is too small and dim to be visible.

So my question is, how many tiny red dwarf stars are on the other side of the galaxy? Or even on this side, but more than 100 light years away? We cannot yet even guess at the number.

Answer 2

There is no star at that exact distance.

"Barnard's Star" is about 6 light years away and "Wolf 359" is about 7.8 light years away.

See the link below for a list of nearby stars.

Answer 3

Perhaps more than that. From Wikipedia: "It is estimated to contain at least 200 billion stars and possibly up to 400 billion stars, the exact figure depending on the number of very low-mass stars, which is highly uncertain."

Answer 4

The Galaxy UDFy-38135539 is 13.1 billion light years away. And the light we see from it is from when the Universe was only 600 million years old. It gives a great insight into how the universe looked in its early years.

Answer 5

One light year is approximately 6 trillion miles. In other words to travel one light year you would have to go 6,000,000,000,000 miles in one year. (Another way to look at is light travels a 186,000 miles per second) To answer your question you would have to multiply 20 times 6000000000000 which would be 120,000,000,000,000. If a new star would light up the very second the star lit up that light would have to travel 120,000,000,000,000 Miles or 20 years before we on earth would be able to see the its light.

Answer 6

One light-year is the distance that light travels in 1 year.

Light travels at 186,000 miles per second, or 300,000 km per second.

There are 60 seconds in a minute, 60 minutes in an hour, 24 hours in a day, and 365.26 days in a year. Just multiply all those numbers together.

Answer 7

If you were traveling at the speed of light (186,000 miles per second) then it would take you 20 years to travel 20 light years. A light-year is a measurement of the distance that a beam of light would travel in a year. Modern interplanetary spacecraft can not travel anywhere near the speed of light, not even one percent of it!

A beam of light would travel to from Earth to Pluto in around 6 hours. The variation in the exact time would depend on the position of Earth and Pluto in their orbits around the Sun. Nevertheless, light speed is extremely fast considering the New Horizons spacecraft was launched in 2006 and will not reach Pluto until the year 2015.

Light Speed: A 6 hour flight to Pluto

New Horizons: A 9 year flight to Pluto

Getting back to your original question, if we were to send a spacecraft to a star that was 20 light-years away, it would take millions of years using our current technology. This is all because we can't travel anywhere near the speed of light... yet.

Answer 8

There is no galaxy 200 light-years from the Milky Way. The Milky Way is very big -- the center of the Milky Way is 30,000 light-years from Earth.

Technically, the Canis Major Dwarf Galaxy is the closest galaxy at 42,000 light-years from the center of our Milky Way, or 25,000 light-years from Earth. It is about 1/200th the size of our Milky Way.

Answer 9

light travels 186000 miles per second, multiply by 60, then 24 to get miles per day. Multiply THAT by 365.25 for a year. That is a Light Year, expressed in miles. Multiply by 4.2, then DIVIDE by 0.62 to express your answer in km.

Answer 10

Values change, but....

With the naked eye about 133 stars are visible within 50 light years.

With a telescope the value increases to about 2,000 stars.

These values are only for visible stars, there is a high probability that there are brown dwarfs and cooler red dwarfs that have not yet been detected.