The diameter of Venus is only about 400 miles less than that of Earth.
Jupiter is two-and-a-half times larger than all the other planets, satellites, asteroids, and comets of our solar system combined.
The Sun's equator is 2,717,952 miles around; it would take 3,645,000,000 people holding hands to go around it.
The discovery of Neptune was announced in 1846. But when astronomers checked previous records, they found the record of an observation of the planet as far back as 1795 by astronomers who, believing it to be a star, recorded the position routinely.
Jupiter spins faster than any other planet. A point on the equator of Jupiter spins faster around the center of the planet at a speed of 28,273 mph. The speed of the spin makes the planet bulge slightly at its equator.
The Sun's solar wind is so powerful, it has large effects on the tails of comets, and scientists have determined that it even has measurable effects on the trajectories of spacecraft.
The distance around the Earth's equator is 24,920 miles; it would take 33,000,000 people holding hands to reach across distance.
Jupiter takes almost 12 years to make a full orbit of the Sun.
The sun's surface area is 12,000 times that of the Earth.
The Earth is 92.8 million miles away from the sun.
Jupiter, the largest planet in our solar system, weighs over twice as much as all of the other known planets combined.
The Sun's total lifetime as a star capable of maintaining a life-bearing Earth is about 11 billion years. Nearly half the time has passed.
The Earth is the most dense planet – five times denser than water, while Saturn is the least dense. It has a density 0.7 times that of water.
Jupiter's moon Adrastea is one of the smallest moons in our solar system. It measures about 20 km (12.4 miles).
The Earth moves in its 585-million-mile orbit around the Sun approximately eight times faster than a bullet travels.
Just 20 seconds' worth of fuel remained when Apollo 11's lunar module landed on the moon.
Just how big is Jupiter? If the mass of all nine planets could be collected into one sphere, Jupiter would make up 71 percent of the whole.
Earth rotates on its axis more slowly in March than in September.
Earth's moon has no global magnetic field.
Ellen Ochoa became the first Hispanic woman in space on a nine-day mission aboard the shuttle Discovery in 1993 during a study of Earth's ozone layer. NASA has honored Ochoa with seven awards for outstanding achievement.
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