- More Stars Than Grains of Sand: There are more stars in the universe than grains of sand on all the beaches on Earth, estimated to be at least a billion trillion1.
- Black Holes: A black hole is created when massive stars explode. Its gravitational force is so strong that nothing can escape from it1.
- Expanding Universe: The universe has no center and is constantly expanding, making it impossible to reach the edge1.
- Age of the Universe: The universe is about 13.8 billion years old, while Earth is around 4.5 billion years old1.
- Tiny Earth: Earth is tiny compared to the rest of the universe; it could fit into the sun 1.3 million times1.
- Eclipses: In 840 AD, Emperor Louis of Bavaria died of fright during a solar eclipse1.
- Tides and Waves: The moon, along with the sun, moves billions of tonnes of water each day, causing tides and waves on Earth1.
- Mercury’s Day and Year: A day on Mercury lasts longer than its year. Mercury’s year is 88 Earth days, while a day on Mercury is 176 Earth days1.
- Stardust: We are made of stardust. The elements in our bodies were formed in the cores of stars2.
- Cosmic Cannibalism: Galaxies can collide and merge, a process known as cosmic cannibalism
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