Could we see a galaxy that is 50billion light-years away?
Could we see a galaxy that is 50 billion light-years away? A. No, because it would be beyond the bounds of our observable universe.
When we look at an object that is 1000 light-years away do we see it?
It takes 1,000 years for light to travel 1,000 light-years, so we see the object as it was 1,000 years ago. Suppose we look at two distant galaxies: Galaxy 1 is twice as far away as Galaxy 2.
How long does it take our solar system to complete one orbit around the Milky Way galaxy?
about 230 million years
A Long Way Round It takes our solar system about 230 million years to complete one orbit around the galactic center.
How do you determine how much an object has aged since its light left?
For example, if an object is 10 light-years away, then we see it as it was 10 years ago, but if it is 20 light-years away, we see it as it was 20 years ago. In other words, more distant objects have aged more since their light left on its way to Earth.
When we see the Andromeda galaxy we are seeing it as it was 2.3 million years ago why is this?
For the Sun, its light takes about 8.3 minutes to reach us, so we always see the Sun as it was 8.3 minutes ago. The Andromeda galaxy is about 2.5 million light years away, so we see it as it was 2.5 million years ago.
How long would it take you to count 100 billion stars at a rate of one per second?
It would take more than 3,000 years to count the stars in the Milky Way Galaxy at a rate of one per second. The Milky Way Galaxy is about 100,000 light-years across. How big is the universe? 100 billion galaxies in the observable Universe.
How many years does it take the solar system to orbit the galaxy?
The Milky Way zips along a galactic orbit at an average speed of about 514,000 mph (828,000 km/hr). It takes about 230 million years for our solar system to make one revolution around the galactic center.
How far does our solar system travel in one orbit in light years?
The solar system sits some 26,500 light years from the galactic centre, about halfway along a spiral arm. We orbit the centre of the Milky Way about once every 240 million years.
When we observe a star that is 10 light years away?
How do you determine the age of light?
We measure distances in universe by the units of light year/s or parsec. Which means distance traveled by light in one year equals one light year. Thus the lights we receive from the distant stars or galaxies are coming from many light years away.