Robotic Spaceflight, Space Exploration The Webb telescope’s unique structural “heart” passes extreme tests
Science Does the Hubble Space Telescope actually take a number of sub-exposures and then stack them? If so, how long are typical sub-frames?
Cosmology Ask Astro web extra: What was the size of the universe immediately before and after inflation?
Science How do you distinguish between absorption lines that originate in a distant astronomical object and those from Earth’s atmosphere?
