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As of today, we have 32 known exoplanet systems where there are at least three stars for the planets to orbit. One of them, GW Orionis, has three tilted and large outer dust rings, separated by major gaps. How many stars can orbit each other? Two of the stars areRead More →

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Sputnik was in the form of a sphere, 23 inches (58 centimeters) in diameter and pressurized with nitrogen. Four radio antennas trailed behind. Two radio transmitters within the sphere broadcast a distinctive beep-beep sound that was picked up all over the world. What does a Sputnik look like? The SputnikRead More →