#806 Can a binary star system have planets?
Can a binary star system have planets? Yes. There are two types. There are circumbinary planets that orbit both of the stars and there are circumstellar planets that just orbit…
Can a binary star system have planets? Yes. There are two types. There are circumbinary planets that orbit both of the stars and there are circumstellar planets that just orbit…
Are all stars inside galaxies? No. There are some stars that are not part of a galaxy. Stars can form outside a galaxy, or they can be kicked out of…
What is a nebula? It is an enormous cloud of dust and gas in space. The word nebula is a Latin word, and it means “mist or cloud”. You can…
What is the Fermi paradox? It is the fact that if life in the universe is so common, we should have found signs of it. Enrico Fermi was an Italian…
How long did it take for the sun to get hot? Approximately 10 million years for it to start burning. The sun is hot because of nuclear fusion, which is…
Why are there 12 signs of the Zodiac? Because the Babylonians decided that there should only be 12. What are the signs of the zodiac? The signs of the zodiac…
How do astronomers work out how far away a star is? They use the star’s parallax and the brightness of the star. The easiest way to work out the distance…
I learned this today. A dwarf galaxy is a galaxy with 1000 to a few billion stars. Our galaxy, the Milky Way, has between 200 and 400 billion stars. Dwarf…
I learned this today. Nuclear pasta is a theoretical matter that might exist in the crust of a neutron star. It would be the strongest material in the universe and…
I learned this today. Cold fusion is not possible because atoms repel each other and thermo energy on the scale of millions of degrees is necessary to overcome this repelling…