A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien ...

This is also unprecedented behavior for a black hole. If these weird episodes are the result of an orbiting white dwarf, a type of stellar remnant left behind when a star with around the mass of ...

Credit: NASA / Aurore Simonnet (Sonoma State ... An artist's rendering of a white dwarf star speeding around the black hole 1ES 1927+654. A stream of particles trails the dense star.

Astronomers theorize that a low-mass white dwarf, a compact core of a dead star about as large ... County said in a NASA news release. After the outburst, the black hole appeared to return to ...

Gamma-Ray Bursts (GRBs): Extremely powerful explosions in distant galaxies that emit vast amounts of energy, mainly as gamma rays. Hypernovae (Massive Star Explosions): Ultra-powerful stellar ...

White dwarfs are among the most compact objects in the cosmos, though not as dense as a black hole. Stars with up to eight ... observatories such as NASA's Laser Interferometer Space Antenna ...

They believe the most likely culprit is a spinning white dwarf — an extremely compact core of a dead star that is orbiting around the black hole ... such as NASA’s Laser Interferometer Space ...

However, upcoming gravitational wave observatories like NASA's space-based ... That is because as the black hole drags the white dwarf inward, the dead star is shedding material.

A black hole infamous for strange features has once again baffled astronomers, this time with rapid X-ray flashes. What could they be?