EP 1 (COSMOS FACTS)

Everything in space, including the Milky Way, is moving. The Earth moves around the Sun, the Sun moves in the Milky Way, and the Milky Way cruises through space. The Cosmic Microwave Background radiation, radiation left over from the Big Bang, is used as a reference point to measure the velocity of things moving in space. The Local Group of galaxies, which the Milky Way is part of, is estimated to be moving at about 600 km/s or 2.2 million km/hr!

More than half the stars found in the Milky Way are older than the 4.5-billion-year-old sun. Galaxies like ours typically undergo a stellar baby boom, churning out stars in enormous quantities roughly 10 billion years ago.

According to scientists, about 7 new stars are born in the galaxy every single year.

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