First Planet Discovered Outside Milky Way

Behold, the science!

Based on current theories for planet formation, however, astronomers say HIP 13044b shouldn’t have been born in the first place: The planet’s parent star is extremely metal poor, meaning it contains very few elements heavier than hydrogen and helium.

Astronomers think stars and their planets are made from the same initial building blocks, so if a star has few metals, the disk of material that surrounded the star when it was young—and from which its planets are born—was also metal-poor.

Even though gas giants are made of mostly hydrogen and helium, astronomers think the planets still require an initial core of heavy elements to attract lighter gases and grow.

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One Response to First Planet Discovered Outside Milky Way

  1. Pingback: Some Narcissism, If You’ll Humor Me…. « Obey This Journal, M.D.

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