Settling a long debate, astrophysicists at Goethe University Frankfurt now say neutron stars can’t exceed the mass of 2.16 suns.
Gravitational-wave emission from a collapsing star, via Goethe University.
A brilliant fireball lit up skies in the U.S. state of Michigan Tuesday night and caused the equivalent of a magnitude 2.0 earthquake.
Scientists used the Blue Waters supercomputer to show that a black hole’s relativistic jets and accretion disk both may be spinning – and precessing over time – around an axis separate from the black hole itself.
Artist's concept of a black hole, via Northwestern Now.
Globular star clusters contain our galaxy’s most ancient stars. Astronomers didn’t expect to find a 4-solar-mass black hole in one, but … voila!
Astronomers using ESO’s MUSE instrument on the Very Large Telescope in Chile have discovered a star in the cluster NGC 3201 that is behaving very strangely. It appears to be orbiting an invisible black hole with about four times the mass of the Sun — the first such inactive stellar-mass black hole found in a globular cluster. This important discovery impacts on our understanding of the formation of these star clusters, black holes, and the origins of gravitational wave events.This artist’s impression shows how the star and its massive but invisible black hole companion may look, in the rich heart of the globular star cluster.
2018 will be an excellent year to view Mars. The planet will be closer to Earth – and brighter in our sky – than since 2003. But as big as the moon? Heck no.
Hoax image via social media.
Scientists used drones to map a previously-unknown, 1,600-year-old irrigation system that allowed farming in arid northwest China, one of world’s driest climates.
Aerial view of an ancient irrigation system discovered in the foothills of Xinjiang, China. Image courtesy of Archaeological Research in Asia.
This new moon is most nearly between the Earth and sun for this month. It crosses the sky with the sun during the day.
A new moon is more or less between the Earth and sun. Its lighted half is turned entirely away from us. Image via memrise.com.
This new moon ends the longest lunar month of the 21st century and begins the longest lunar month of 2018.
On Sunday morning, Jupiter and Mars were half a moon-diameter apart. Now the moon is sweeping past. Plus Mercury and Saturn are in conjunction this weekend. Photos here.
Neeraj Ladia in India wrote: "The great planetary alignment of Jupiter, Mars, Saturn, and Mercury (top to bottom) along with the waning crescent moon, captured in the predawn sky of Jan. 14, 2018."