The Youngest Known Exoplanet.  The Youngest Known ExoplanetCredit: NASAThe youngest exoplanet yet discovered is less than 1 million years old and orbits Coku Tau 4, a star 420 light-years away. Astronomers inferred the planet’s presence from an enormous hole in the dusty disk that girdles the star. The hole is 10 times the size of Earth’s orbit around the Sun and probably caused by the planet clearing a space in the dust as it orbits the star.

The Youngest Known Exoplanet. The Youngest Known ExoplanetCredit: NASAThe youngest exoplanet yet discovered is less than 1 million years old and orbits Coku Tau 4, a star 420 light-years away. Astronomers inferred the planet’s presence from an enormous hole in the dusty disk that girdles the star. The hole is 10 times the size of Earth’s orbit around the Sun and probably caused by the planet clearing a space in the dust as it orbits the star.

Hypernova - Gamma rays burst from either pole of a shattered star undergoing a hypernova explosion.  Don Dixon, 2005.

Hypernova - Gamma rays burst from either pole of a shattered star undergoing a hypernova explosion. Don Dixon, 2005.

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