1. There are more than 100 billion galaxies in the universe. The largest galaxies have nearly 400 billion stars. There are an estimated 100 billion stars in the Milky Way, our galaxy. If we tried to count all the stars in just our galaxy at a rate of one star per second, it would take us about 3000 years.
2. The Sun is the largest object in our solar system. It contains roughly 98% of our solar system's total mass. The surface of the Sun is 6000 deg C. The interior of the Sun is 15,000,000 deg C. 1.3 million Earths could fit in the Sun.
3. The Moon is drifting away form the Earth at the rate of 3.8 cm in a year. Because of this, the Earth is also slowing down. 100 years from now, the day will be 2 milliseconds linger.
4. Jupiter is the largest planet in our solar system. It is so big that all other planets could fit inside and the fastest rotating planet 9 hrs and 55 minutes. Jupiter has 63 moons. Europa, one of the Jupiter's moons, is completely covered in ice.
5. Saturn, the second largest planet and its density is so law that it would float in water.
6. Most asteroids lie between the orbits of Mars and Jupiter. Dangerous asteroids, ones that could could cause major regional or global destruction, only hit the Earth every 100,000 years on average. We can Observe more than 20 million meteors every day but only 1 or 2 meteorites hit the Earth's surface each day.
7. By the most accurate definition, there are 1.4 known Black Holes. The closest Cygnus X-1, is 8,000 light years. Black holes only absorb things that cross their event horizon, so they wouldn't destroy the entire universe. It's also possible for black holes to collide and merge. We can't see a black hole because like everything else, they also absorb light.
8. The Big Dipper is an asterism, not a constellation . The Big Dipper is actually a small part of Ursa Major. Ursa Major is the constellation. In the same way, Orion's Be;t is an asterism within the Orion constellation.
9. The darkest space, with absolutely nothing around, would be about 2.7 Kelvin(-270 deg C). Space would be absolute zero except for background radiation which makes it ever slightly warmer.
10. Highways, airports,the pyramids, and even large vehicles have been seen by shuttle astronauts at 217 kilometers from Earth. In fact, the Great Wall is much less visible than other things, especially things that are either reflective or a color that contrasts the surrounding areal
2. The Sun is the largest object in our solar system. It contains roughly 98% of our solar system's total mass. The surface of the Sun is 6000 deg C. The interior of the Sun is 15,000,000 deg C. 1.3 million Earths could fit in the Sun.
3. The Moon is drifting away form the Earth at the rate of 3.8 cm in a year. Because of this, the Earth is also slowing down. 100 years from now, the day will be 2 milliseconds linger.
4. Jupiter is the largest planet in our solar system. It is so big that all other planets could fit inside and the fastest rotating planet 9 hrs and 55 minutes. Jupiter has 63 moons. Europa, one of the Jupiter's moons, is completely covered in ice.
5. Saturn, the second largest planet and its density is so law that it would float in water.
6. Most asteroids lie between the orbits of Mars and Jupiter. Dangerous asteroids, ones that could could cause major regional or global destruction, only hit the Earth every 100,000 years on average. We can Observe more than 20 million meteors every day but only 1 or 2 meteorites hit the Earth's surface each day.
7. By the most accurate definition, there are 1.4 known Black Holes. The closest Cygnus X-1, is 8,000 light years. Black holes only absorb things that cross their event horizon, so they wouldn't destroy the entire universe. It's also possible for black holes to collide and merge. We can't see a black hole because like everything else, they also absorb light.
8. The Big Dipper is an asterism, not a constellation . The Big Dipper is actually a small part of Ursa Major. Ursa Major is the constellation. In the same way, Orion's Be;t is an asterism within the Orion constellation.
9. The darkest space, with absolutely nothing around, would be about 2.7 Kelvin(-270 deg C). Space would be absolute zero except for background radiation which makes it ever slightly warmer.
10. Highways, airports,the pyramids, and even large vehicles have been seen by shuttle astronauts at 217 kilometers from Earth. In fact, the Great Wall is much less visible than other things, especially things that are either reflective or a color that contrasts the surrounding areal
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