October 15 2016 Astronomy Newsletter
Here's the latest article from the Astronomy site at BellaOnline.com.
Europa Facts for Kids
Astronomers are very interested in Jupiter's moon Europa. They think that it has a large ocean covering the moon under its icy crust, and that it would be a good place to look for life.
*The Universe has many more galaxies than we thought*
A new analysis of Hubble Space Telescope data finds there are almost 10 times more galaxies in the universe than we once thought there were — about 2 trillion of them, up from about 200 billion. This is, by the way, the observable Universe we're talking about. Obviously we can't say much about the rest of it. More about this: http://www.popsci.com/universe-may-contain-10-times-more-galaxies-than-we-thought
(1) October 10, 1980: the Very Large Array (VLA) was dedicated. Now known as the Karl G. Jansky Very Large Array, it's a radio astronomy observatory located near Socorro, New Mexico.
(2) October 11, 1758: Heinrich Olbers was born. Olbers was a German physician and astronomer who is best known for his discovery of two asteroids. One of them, Pallas, was the first one to be discovered after Piazza's discovery of the first known asteroid (now dwarf planet) Ceres.
(3) October 15, 1829: American astronomer Asaph Hall was born. He discovered the two moons of Mars.
(4) October 15, 1997: The Cassini-Huygens mission was launched to Saturn. Huygens landed on Titan, Saturn's large moon. Cassini is still sending back splendid images and collecting data.
(5) October 19, 1910: Subramanyan Chandrasekhar was born. He did outstanding work in several fields and won a Nobel Prize. One aspect of his work was on black holes. His work greatly extended the understanding of the death of stars, as he showed mathematically how a dying star became a white dwarf, and suggested this wasn't always the end point of stellar evolution.
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I wish you clear skies.
Mona Evans, Astronomy Editor
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