Archive for the ‘cosmology’ category: Page 169
Aug 3, 2022
The Universe: Space Weapons Prepare for War (S4, E8) | Full Episode | History
Posted by Dan Breeden in categories: cosmology, military, satellites
Outer space is already an essential part of America’s ability to fight wars. Our military depends on satellites for many things, such as communications, reconnaissance and targeting information. See more in Season 4, Episode 8, “Space Wars.”
#TheUniverse.
Continue reading “The Universe: Space Weapons Prepare for War (S4, E8) | Full Episode | History” »
Aug 3, 2022
Planets made of dark matter may have blown up, and we could see them
Posted by Quinn Sena in category: cosmology
A new hypothesis proposes that a large fraction of dark matter may be bound up inside tight balls the size of Neptune — so-called dark matter planets.
Aug 3, 2022
A Star Just Turned Into A Black Hole Before Hubble’s Very Eyes
Posted by Shubham Ghosh Roy in category: cosmology
What remains are mostly neutron stars or black holes. And now, Hubble seems to have documented the instant when a supernova blinked out — implying that it captured the moment a black hole took control.
While some supernova explosions, such as SN 1,054, are violent and leave clouds of debris for thousands of years (a.k.a. nebula), the star in question seems to have exploded and then had all its gas pulled back into the black hole at the core. This may occur if the star’s core collapse is very big. Rather than exploding, the gas falls into the star’s core.
Aug 3, 2022
Scientists Hope That Their Discovery About Black Holes is a Mistake. What Did They See?
Posted by Shubham Ghosh Roy in category: cosmology
Over the past few years, astronomers have become aware of some shocking new properties of black holes.
As it turned out, they not only mercilessly consume and destroy everything that falls into them.
Aug 3, 2022
Webb Captures Stellar Gymnastics in The Cartwheel Galaxy
Posted by Shubham Ghosh Roy in category: cosmology
NASA’s James Webb Space Telescope has peered into the chaos of the Cartwheel Galaxy, revealing new details about star formation and the galaxy’s central black hole. Webb’s powerful infrared gaze produced this detailed image of the Cartwheel and two smaller companion galaxies against a backdrop of many other galaxies.
Aug 2, 2022
Dark matter from 12 billion years ago detected for the 1st time
Posted by Quinn Sena in category: cosmology
Scientists used a fossil relic left over from the Big Bang to perform the earliest detection of dark matter ever.
Astronomers used the cosmic microwave background, radiation left over from just after the Big Bang, to conduct the earliest ever detection of dark matter.
Aug 2, 2022
Dark Matter Mapped Around Distant Galaxies
Posted by Saúl Morales Rodriguéz in categories: cosmology, evolution
Gravitational lensing of the cosmic microwave background has been used to probe the distribution of dark matter around some of the earliest galaxies in the Universe.
Investigating the properties of galaxies is fundamental to uncovering the still-unknown nature of the dominant forms of mass and energy in the Universe: dark matter and dark energy. Dark matter resides in “halos” surrounding galaxies, and information on the evolution of this invisible substance can be obtained by examining galaxies over a wide range of cosmic time. But observing distant galaxies—those at high redshifts—poses a challenge for astronomers because these objects look very dim. Fortunately, there is another way to probe the dark matter around such galaxies: via the imprint it leaves on the pattern of cosmic microwave background (CMB) temperature fluctuations through gravitational lensing (Fig. 1).
Aug 2, 2022
Scientists reveal distribution of dark matter around galaxies 12 billion years ago–further back in time than ever before
Posted by Gemechu Taye in category: cosmology
Aug 2, 2022
Physicists Discover Oldest Dark Matter Yet With Lensed Microwaves
Posted by Shubham Ghosh Roy in categories: cosmology, physics
Lensing of the cosmic microwave background indicates 12-billion-year-old galaxies had dark matter.