Emery Holloway

Latest Articles

How do astronomers think the four Galilean moons of Jupiter formed?

Who witnessed the first supernova?

Are there any real photos of Venus?

What is the best explanation for the close-in orbits of hot Jupiters?

How many geostationary satellites are required for global coverage?

Is our Solar System in the Sagittarius Arm?

Why do red giants cool?

Why do stars emit radiation?

How to tell if a star is close?

Could Mars rover talk?