Alden Calder
Latest Articles
12/21/2025
Why can't rockets be electric?
12/20/2025
How often do Starlink satellites fall to Earth?
12/20/2025
What is the best explanation for the location of hot Jupiters?
12/20/2025
What elements are found in a nebula?
12/20/2025
How does the SpaceX rocket return to Earth?
12/20/2025
What did we do about the flaw in the Hubble Space Telescope?
12/20/2025
What are the constellations the Sun passes through called?
12/20/2025
Are most galaxies red or blue-shifted?
12/20/2025