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This artist concept shows a pulsar, which is like a lighthouse, as its light appears in regular pulses as it rotates. Pulsars are dense remnants of exploded stars, and are part of a class of objects called neutron stars.

This artist concept depicts the pulsar planet system discovered by Aleksander Wolszczan in 1992. Wolszczan used the Arecibo radio telescope in Puerto Rico to find three planets circling a pulsar called PSR B1257+12.

This plot shows that a pulsar, the remnant of a stellar explosion, is surrounded by a disk of its own ashes. The disk, revealed by the two data points at the far right from NASA Spitzer Space Telescope, is the first ever found around a pulsar.

This artist concept depicts a type of dead star called a pulsar and the surrounding disk of rubble discovered by NASA Spitzer Space Telescope. The pulsar, called 4U 0142+61, was once a massive star until about 100,000 years ago.

Nicknamed the Hand of God, this object is called a pulsar wind nebula, imaged by NASA NuSTAR. It powered by the leftover, dense core of a star that blew up in a supernova explosion.

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Moon Trees

A sycamore "Moon Tree" at Goddard Space Flight Center