Space

• Are there different types of black holes?
• Can a star turn into a planet?
• Can gravity form waves?
• Does every black hole contain a singularity?
• Does everything get smashed to bits when two galaxies collide?
• Does sound travel faster in space?
• Does the influence of gravity extend out forever?
• Galaxies look stationary, so why do scientists say that they rotate?
• Have aliens ever visited earth?
• Have astronomers ever observed a violet shift like they have blue shifts and red shifts?
• How bright is a laser beam when viewed from the side?
• How can astronomers know things for certain since they only look at space from one vantage point?
• How can there be anything left in the universe? Don't black holes suck everything in?
• How can you cancel out the jolt of a quick start?
• How can you tell a black hole made out of antimatter from a black hole made out of matter?
• How do space probes make it past the asteroid belt without crashing into asteroids?
• How do space ships fly faster than light?
• How do space ships make artificial gravity?
• How do stars move when viewed from a speeding space ship?
• How does a black hole give off light?
• How does a supernova completely destroy a star?
• How does astrology work?
• How does looking at distant galaxies allow us to look back in time?
• How does the expansion of the universe make outer space a vacuum?
• How large would a bucket of water have to be to put out the sun?
• How long before the expansion of the universe causes our earth to drift away from the sun?
• How long can a human in outer space last without a spacesuit before exploding?
• How often does the sun's magnetic field flip?
• I know that the gravity of the moon causes ocean tides on earth. How does centrifugal force cause the far-side bulge?
• Is a black hole a 2D or a 3D object?
• Is Pluto a planet?
• Since a star's light takes so long to reach us, how do we know that the star is still there?
• Since one satellite can see half of the earth, why do we need more than two satellites in a given network?
• What could a space ship do if it stopped because it ran out of fuel?
• What is the color of the sun?
• What is the overall electric charge of the universe?
• What is the range of weapons if used in space?
• What keeps space empty?
• What keeps the North Star stuck at exactly North?
• What keeps the sun spinning?
• What kind of space ships can make banking turns?
• What makes meteorites so hot that you can't touch them?
• What makes space so cold?
• What makes the Great Wall of China the only man-made object visible from space?
• What would space ships actually look like in space?
• When do the planets in our solar system all line up?
• Where is the center of the universe?
• Where is the edge of the universe?
• Which space movie has the most accurate physics?
• Why are all the stars fixed in space?
• Why are stars not blurred even though the earth is moving?
• Why did NASA spend millions developing a pen that would work in space when a pencil is just as good?
• Why did people believe the earth is the center of the solar system when it's obvious the sun is?
• Why do the spikes that shoot out of stars form perfect crosses?
• Why does everything in our galaxy orbit the supermassive black hole at the center?
• Why does the moon get bigger when it's closer to the horizon?
• Why does the moon's gravity cause tides on earth but the sun's gravity doesn't?
• Why does the sun not run out of oxygen as it burns?
• Why doesn't the earth fall down?
• Why don't galaxies have a natural magnetic field like the earth does?
• Why is gravity the strongest force?
• Why is the moon so bright?
• Why is there no gravity in space?
• Why is there no up and down in space?
• Will the night sky eventually end up completely black because the universe is expanding?
• Would a guitar sound the same on a space station?