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• When you look into the night sky, how do you tell the difference between a star and a satellite?

  Asked by jca | 10 responses

• Was the half moon larger on March 4, 2017 than March 5, 2017, if so why?

  Asked by flo | 8 responses

• Does Mercury have a comet cluster?

  Asked by luigirovatti | 4 responses

• Can you really balance an egg on its tip on Solstice?

  Asked by occ | 12 responses

• Should I drop this Physics course?

  Asked by Hobbes | 8 responses

• Density difference of the same substance?

  Asked by martzel86 | 9 responses

• Is there a name for the imaginary / theoretical Solar plane which the planets orbit within?

  Asked by Yellowdog | 5 responses

• Do you think the following quote about the rejection about the Big Bang theory is good enough to be considered?

  Asked by luigirovatti | 14 responses

• How long does it take to get to the moon?

  Asked by penumbra | 8 responses

• What is the best telescope to buy under $700 that has all the capabilities of a powerful, super expensive one?

  Asked by Jaybee | 11 responses

• Rotation of the Moon?

  Asked by gorillapaws | 4 responses

• How many black holes are there in the Milky Way and why are there so many different scientific estimates?

  Asked by mattbrowne | 14 responses

• What advancements in home and public astronomy are coming down the works?

  Asked by talljasperman | 4 responses

• What are the names of the sun and the moon?

  Asked by RedDeerGuy1 | 15 responses

• What is an Astronomer?

  Asked by aaronb | 21 responses

• Why does the hole in Jupiter persist?

  Asked by socker | 1 response

• What happens when a black hole evaporates?

  Asked by ETpro | 10 responses

• How many moons does Mercury have?

  Asked by penumbra | 2 responses

• What is the structure of my made up planet?

  Asked by punkrockworld | 10 responses

• What would the climate of Mars be (due to distance from the sun) if it were more Earthlike?

  Asked by Yellowdog | 3 responses

• Why was it such a big deal to take a picture of a black hole?

  Asked by Dutchess_III | 8 responses

• What is the best place to watch the Perseid Meteor Shower in the San Francisco Bay Area?

  Asked by chungwu | 7 responses

• What could this robot be thinking now?

  Asked by mazingerz88 | 11 responses

• Is the earth in essentially the same position it was everyday before?

  Asked by Ltryptophan from iPhone | 13 responses

• Would an ordinary black hole attract antimatter?

  Asked by ETpro | 11 responses

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