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But just how big is the Earth? The Earth has a radius of 2.439 kilometers / 1.516 miles and a diameter of only 12.742 km / 7.917 mi. When it comes to weight, the mass of Earth is equivalent to 5.9 quadrillion kg. In the Solar System, our Earth is the fifth largest planet and the largest of the terrestrial planets.
The Earth is so big that if it were hallowed, almost 50 moons could fit inside it. Earth has a mass of about 6.6 sextillion tons and a volume of about 260 billion cubic miles / 1 trillion cubic kilometers. It has the biggest mass out of all the terrestrial planets and the greatest density out of all the planets - 5.51 g/cm³.
So, how big is the Sun? More than one million Earths could fit inside the Sun if it were hollow. The Sun has a radius of 696.340 km / 432.685 mi and a diameter of 1.39 million km / 864.000 mi. Earth, for comparison, has a radius of only 2.439 km / 1.516 mi, and a diameter of just 12.742 km / 7.917 mi.
This planet is so big that it would take around 1.300 Earths just to fill its volume! So how big is Jupiter actually? Well, Jupiter has a diameter of around 142.984 km / 88.846 mi at the equator, and a diameter of about 133.708 km / 83.082 mi at the poles. It has a mean radius of 69.911 km / 43.440 mi, and its mass is equivalent to 318 Earth ...
How big is the Moon? Our Moon has a mean radius of 1,737 kilometers / 1,079 miles, while its polar radius is 1,736 km / 1,078 mi, and its equatorial radius is 1,738 km / 1,079 mi. The Moon’s diameter is 3,474 km / 2,158 mi, and it is the biggest Moon in the Solar System relative to the size of its planet.
This theory is named the Big Freeze. Another popular scenario suggests that our Universe will stop expanding, and will actually reverse this process. When this happens, the Universe will re-collapse, and it will possibly lead to a reformation that will start with another Big Bang. This scenario is called the Big Crunch.
If you measured the radius from Earth’s center to the equator, you would obtain a radius of 3.963.2 mi / 6.378.1 km. However, if you would measure it from the center to one of Earth’s polar regions, you would obtain a radius of 3.949.9 mi / 6.356.8 km. It isn’t such a big difference, but it is present.
Since the Earth moves around the Sun, the distance differs, with Earth’s closest point from the Sun – perihelion – reaching 147.5 million km / 91.3 million mi. When it comes to Earth’s farthest point from the Sun – aphelion – it is around 152 million km / 94.5 million mi, a little over 1 AU away from the Sun.
Earth formed at around the same time as the rest of our Solar System. Earth revolves around the Sun once every 365.25 days – this is known as one Earth year. In one year, Earth rotates like a spinning ball about 366.25 times – they are known as Earth days. Earth is the fifth largest planet of the Solar System.
The farthest star to us of the Big Dipper asterism is the second-brightest star of Ursa Major, the bright orange giant Dubhe, located at around 123 light-years away. The Big Dipper stars, Dubhe and Merak, are used in finding the North Pole Star, Polaris. The Big Dipper asterism is associated with many different myths and folk tales across the ...