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white dwarf

The planetary nebula NGC 3918, a bright cloud of colored gas in the constellation, about 4,900 light-years from Earth as imaged by the Hubble Space Telescope. Photo: NASA/ESA

A celestial eye turns a piercing gaze to the Hubble Space Telescope that photographed it

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The double star system AR Scorpii, located 380 light years from Earth is an unusual system. The white dwarf that shoots a concentrated beam of electrons that hits every two minutes (its spin time) its neighbor in the system - a red dwarf. Illustration: University of Warwick.

An unusual pulsar produces a focused particle accelerator-like beam that strikes its neighbor in the binary star system

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supernova Illustration: shutterstock

Landmarks in the universe

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Image from a Type Ia supernova simulation. In the simulation, a star exploding in a Type Ia supernova (in dark brown). Material from the supernova was ejected at a speed of about 10,000 kilometers per second. The material hits its companion star (in light blue). This violent collision produces ultraviolet pulses that eject from a "hole" created by the companion star. Image: Dan Kasen

A star explodes in a supernova and takes the companion star with it

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Artist's illustration of a white dwarf orbiting the pulsar PSR J2222-0137. It may be the coldest and dimmer white dwarf ever discovered. Figure: B. Saxton (NRAO/AUI/NSF)

A diamond the size of the Earth

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The supernova sn2011fe in the galaxy M-101 on August 25, 2011. Photo: Hubble Space Telescope

sn2011fe – bright supernova in galaxy M-101

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The signals from the pulsar (behind) pass by a white dwarf and are amplified. Illustration: National Radio Observatory

Astronomers discover the most massive neutron star

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A diamond star excites astronomers

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