Skywatch

  • October 19, 2006

    Episode 63: HubbleWatch for October 2006

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    Hubblewatch

    Shownotes

    Searching for planets, Hubble is finding strange, immense objects that fall in between planets and stars. Hubble recently found an object orbiting a red star that is about the size of Jupiter, but weighs 12 times more. The object could be a planet, or it could be a star that was unable to achieve fusion - an object also known as a brown dwarf. Hubble has uncovered a number of galaxies that existed less than a billion years after the Big Bang. Astronomers believe the new observations help show that galaxies grew from smaller star clusters that drew together and merged. Many of the galaxies are obvious around 900 million years after the Big Bang, but scientists can find very few only 200 million years earlier, indicating a lot of small-galaxy collision and merging during those 200 million years.