What was the last Apollo mission? The last Apollo mission was Apollo 17. The Apollo program stretched from 1967 until 1972. There was supposed to be an Apollo 18, 19, and 20 but they were all cancelled. The booster for Apollo 20 was repurposed to launch Skylab, America’s first space station into orbit. The decision […]
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Could Earth survive without the moon? The planet would survive, but the living organisms on it might have a harder time. The moon was probably formed when another protoplanet hit the young Earth, obliterating both and making the Earth and moon from the resultant mush. The moon began life at a distance of about 22,500
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How much space junk is there? There are over 128 million pieces of space junk in orbit around Earth at the moment. There are 5,465 satellites orbiting in space at the moment. 84% of those are in a low Earth orbit. There is also the International Space Station circling the Earth. Over the last decade,
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How can the inner core of the Earth switch rotation? Because it is separated from the solid mantle and can rotate at a different speed. The Earth has four layers. There is the outer crust that we and everything alive lives on. The crust is about 40 km deep and is only 1% of Earth’s
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How many dimensions are there? There are either 4, 10, 11, or infinite dimensions, depending on what theory you read. What is a dimension? A dimension is the minimum number of coordinates needed to specify a point within that dimension. We can experience four dimensions. The first dimension is length. A straight line exists in
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How did Galileo realize that the Earth orbits the sun? He realized it when he observed the orbit of Venus. Galileo was born in 1564 in Pisa, Italy. Galileo is famous for saying that the Earth orbits the sun rather than the sun orbits the Earth, but he was not the first person to come
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What is the densest material in the universe? Osmium is the densest material on Earth, but the densest material in the universe (that we know of) is that of a neutron star. What is density? Density is the amount of mass that something has in relation to the space that it occupies. For example, a
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Does the Oort cloud exist? Possibly, but there is no way of knowing. It is still just a working theory. The Oort cloud was first theorized by Jan Oort, a Dutch astronomer, in 1950. The idea is that a cloud of icy comets and planetesimals are orbiting the sun at a distance of about 0.03
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How far will the Voyager probes go? As far as they can get before they are eroded to nothing by space dust. Voyager 1 and 2 were both launched in 1977. As of today, December 4th 2022, Voyager 1 is about 23.7 billion kilometers from the sun and Voyager 2 is about 19.8 billion kilometers
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How thick are Saturn’s rings? The rings of Saturn are incredibly thin. They are only about 10 meters thick. Saturn is a massive planet. It is the second largest planet in the solar system and is 95 times larger than Earth. It is a gas giant, but it could have a solid cure. It has
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