Questions to an Astronomer from Paris Observatory

• Ask an Astronomer at Lick Observatory
• Ask the Space Scientist
• Curious About Astronomy? Ask an Astronomer! - scientists at Cornell University will answer your astronomy questions.
• Just Curious Astronomy & Space
• Ask Izzy -your questions about amateur astronomy and backyard observing answered.
• Ask a High-Energy Astronomer
• Ask Mr Sunspot at the National Solar Observatory
• Interactive Sky Map: Your Sky
• Trajectories of artificial satellites in the sky