You might think Mars is Earth’s closest planetary neighbor, but on average, Venus is actually closer. Because of how planets…
Sunlight takes just 8 minutes to reach Earth, but to get to Neptune, the Sun’s rays need over 4 hours…
The Sun is so massive that it could hold about 1.3 million Earths inside its volume. Even if you just…
Jupiter’s Great Red Spot—the massive storm that’s been raging for at least 300 years—is so big that Earth could fit…
In 1966, the Soviet Union sent Luna 10, the first artificial satellite to orbit the Moon. It spent 56 days…
Launched by the U.S. in 1958, Vanguard 1 is the oldest man-made satellite still in orbit. Though it stopped communicating…
Tears don’t fall in space—they just float and stick to an astronaut’s face. Without gravity to pull them down, tears…
In microgravity, the spinal column stretches, making astronauts grow up to 2 inches (5 cm) taller while in space. But…
Planets larger than Earth but smaller than Neptune are called super-Earths, and they might be the most common type of…