Astronomy

Photo: Fluorescent planetary nebula 4,900 light-years away

The Hubble Space Telescope captured an image of planetary nebula NGC 3918, which is a part of the the Centaurus constellation about 4,900 light-years from Earth, according to NASA.

Between the lines: A planetary nebula is a cloud of colorful gasses which surrounds a dying star — known as a red giant, according to NASA. The remnants of the star give off the light, which reflects in the gasses and creates the beautiful, dramatic colors seen in the photo.

Scientists trace neutrino to source outside our galaxy

IceCube lab in Antarctica under the stars.
IceCube lab. Photo: Martin Wolf/IceCube/NSF

In a find that advances our understanding of fundamental particles in the universe, scientists announced Thursday they've detected a high-energy neutrino from outside our galaxy and, for the first-time, pinpointed its source.

Why it matters: The evidence, detailed in two new studies in the journal Science, further demonstrate the potential for multi-messenger astronomy — that is, astronomy that looks at the whole electromagnetic spectrum — to help scientists answer longstanding mysteries about high-energy physics.