January 23, 2019

How many other galaxies are there?

As recently as a hundred years ago, astronomers thought the entire universe was contained in the Milky Way. But then Edwin Hubble figured out how to […]
January 23, 2019

How long does it take our solar system to orbit the center of the galaxy?

We are moving at an average velocity of 828,000 km/hr. But even at that high rate, it still takes us about 230 million years to make […]
January 23, 2019

What’s our nearest neighboring spiral galaxy?

That would be Andromeda, a spiral galaxy like the Milky Way. Astronomers believe it contains as many as a trillion stars. At 2.5 million light-years away, […]
January 23, 2019

Why is the sun so important?

Think Earth is the most important spot in the solar system? The sun is the real star of the show – literally! The closest star to […]