Ask Astro

Observing

Are either of the moons of Mars large enough to eclipse the Sun as seen from the surface of Mars?

Science

I’ve read that Moon-walking Apollo astronauts said lunar dust on their space suits smelled like spent firecrackers. When humans go to Mars, do we have any idea what Mars dust might smell like?

Science

Why doesn’t NASA attach the Hubble Space Telescope to the International Space Station (ISS) to service the telescope safely? Is that technically feasible?

Observing, The Sun

How can I safely view the Sun?