- What what a black hole merger look like from a telescope? (Advanced)
- Do galaxy mergers have a major impact on star formation rates within the galaxies? (Intermediate)
- Our universe is still expanding, does that mean things in our daily life are expanding? (Intermediate)
- What was the bright, smoothly moving star that I saw? (Beginner)
- What happened to the Arecibo Telescope? (Beginner)
- Can I buy or name a star? (Beginner)
- If I were hypothetically wearing a spacesuit and sitting on one of the Voyager space probes at their current positions in space, how much light would I have? (Intermediate)
- What makes certain lunar eclipses so special? (Beginner)
- Why is Earth's core molten? (Intermediate)
- What will happen to Earth's tides as the moon moves away from us? (Intermediate)
- How can spiral galaxies keep their shape? (Advanced)
- Does a black hole have a "surface"? (Intermediate)
- How can you link telescopes to make a bigger "effective telescope"? (Intermediate)
- What should I know about the upcoming Solar Eclipse (2017)? (Beginner)
- Do galaxies that are receding from us faster than the speed of light disappear from our observations? (Intermediate)
- Why are astronomers interested in gravitational waves? (Intermediate)
- Can two galaxies move away from each other faster than the speed of light? (Intermediate)
- What is a graviton? (Intermediate)
- Why are there high tides during a Full Moon? (Intermediate)
- Why is Neptune still considered a planet when Pluto crosses its orbit? (Intermediate)
- Could there be objects orbiting interior to Mercury? (Intermediate)
- Have the inner planets cleared their neighborhood? (Intermediate)
- What caused the Big Bang and created the Universe? (Beginner)
- If spacetime is curved, is it possible for us to look into space and see light from Earth from long ago? (Intermediate)
- What effect did compression waves have immediately following the Big Bang? (Intermediate)
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