Cosmology Archives - Astronomy Explained

What is Beyond the Observable Universe?

I had a lengthy article about how big is the observable universe and what is the observable universe previously. In […]

When a medium-sized star like our Sun gets old and dies, it sheds its outer layers in a glowing gas.

By now, we know that space has a lot of gas, dust, and darkness. A nebula is just one of

Ever looked up at the night sky and thought, “Okay, but… how big is all this, really?” what exists beyond

Have you ever wondered how our solar system came into existence? How did our whole solar system get started? Through

Have you ever wondered what the limit of what we can see out there in the sky is in the

Did you know that some nebulae stretch hundreds of light-years across? Imagine a cosmic artist splattering clouds of gas and

Neutron stars are ridiculously dense and hot (see how hot they actually are in my article: here). Imagine cramming the

Did you know over 50% of all stars in our Galaxy are in pairs or groups? Over 50% is a

Have you ever looked up at the night sky and wondered, how do stars form? How and when did the