How many light years have we observed?

46.6 billion light-years
Since the universe has been expanding for 13.8 billion years, the comoving distance (radius) is now about 46.6 billion light-years.

How can we see things light years away?

Thanks to a Gravitational Lens, Astronomers Can See an Individual Star 9 Billion Light-Years Away. When looking to study the most distant objects in the Universe, astronomers often rely on a technique known as Gravitational Lensing.

How far have we explored space?

The record for the farthest distance that humans have traveled goes to the all-American crew of famous Apollo 13 who were 400,171 kilometers (248,655 miles) away from Earth on April 14, 1970.

How many galaxies are within 1 billion light-years?

The supercluster is about 1 billion light years away. An all-sky plot of the 60000 brightest galaxies shows how galaxies clump together into large supercluster formations. The positions of some of the major superclusters are marked although only the nearest superclusters are prominant.

What will happen to the Earth four billion years from now?

Four billion years from now, the increase in the Earth’s surface temperature will cause a runaway greenhouse effect, heating the surface enough to melt it. By that point, all life on the Earth will be extinct. The most probable fate of the planet is absorption by the Sun in about 7.5 billion years,…

How can the light of stars billions of light years away?

How can the light of stars billions of light years away from the earth have reached us if the earth is only thousands of years old? A light-year is the maximum distance that light can travel in one year in the vacuum of space. Consequently, it takes billions of years for light to travel billions of light-years through space.

Is the universe less than 10000 years old?

This reasonable assumption contradicts the Young Earth (YE) perspective, which claims that the universe is less than 10,000 years old. If there was not a strong scientific case for the YE perspective, this contradiction would not merit a second thought.

Why are galaxies 27 billion light years away?

So over time, two galaxies will drift farther apart from each other like driftwood in a current. The second factor is that we’re not directly measuring a galaxy at 27 billion light-years away from us — we’re seeing ancient light from that galaxy, which has traveled for billions of years through the universe.