There isn’t any atmosphere in space and that means that it doesn’t have a medium for sound to travel in.When you are on Mars, the sunset looks like it’s blue.Scientists believe that there are more stars in the universe than there are grains of sand on all of Earth’s beaches.Thankfully, most of it burns up in the atmosphere before it hits land. Earth is hit by an asteroid around the size of a car around once per year.This is called “space junk” and it’s believed that there are 500,000 pieces of space junk in orbit today. Throughout the years of space travel humans have left a lot of trash in Earth’s orbit.They are almost completely gas so you wouldn’t be able to walk on them. The gas giants in our solar system are Jupiter, Saturn, Uranus and Neptune.Comets are made up of sand, ice, and carbon dioxide and are leftover materials from the formation of our solar system 4.5 billion years ago.NASA findings show strong evidence that Mars might have liquid water. For many years, scientists thought that the Earth might be the only planet in our solar system with liquid water.
Some of the meteoroids that are traveling through our solar system are speeding through it at around 26 mi per second/42 km per second.Uranus is the only planet in our solar system that rotates on its side and Venus is the only planet in our solar system that spins backwards relative to the other planets.A person that weighs 200 pounds on Earth would only weigh 76 pounds if they stood on Mars. In 2006, the International Astronomical Union (IAU) downgraded Pluto from our ninth planet to a dwarf planet.It’s believed that those prints will stay there for millions of years. The moon doesn’t have any wind to blow around and cover the footprints and rover tire tracks that were left by the astronauts.Their rings just aren’t as big and obvious. We know about the rings of Saturn but there are other planets in our solar system that have rings, including Jupiter, Uranus, and Neptune. The moon seems like it has more scars and craters than Earth because it has less activity that affects its surface than Earth.The Earth has constant activity in the way of weather, erosion, earthquakes, and volcanic flow that cover up the many impact craters that have occurred on the planet.Scientists believe that our solar system was formed over 4.6 billion years ago.Venus has temperatures over 450 degrees C and is listed as the hottest planet in our solar system.The last time it was visible from Earth was in 1986 and the next time will be in 2061. Halley’s Comet only enters our inner solar system every 75 years.Our sun is over 300,000 times bigger than the Earth.As we continue to explore we will find that space and the universe brings exciting concepts that astound the imagination. We began sending rockets into space in the 1960s and here we are, only sixty years later, watching images sent back from space missions to Mars, asteroids, and comets, and astronauts living in the space station that orbits our Earth.Īlong the way, we have learned a lot about space that changed previous ideas and gave us entirely new ones. In the last number of years we have learned more about space than at any other time in history. Many cultures have created stories, myths, and songs about space, imagining creatures of all types from angry to friendly. As long as human beings have been looking into the night sky, we have been wondering what is out there.
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