Dark matter
Dark matter is a hypothetical kind of matter that cannot be seen with telescopes but accounts for most of the matter in the Universe. The existence and properties of dark matter are inferred from its ...
Dark matter - Wikipedia
"The Black Hole Paradox" --New Theory Says Soon After Big Bang, Black Holes Lit Up the Universe
Soon after the Big Bang, the universe went completely dark. The intense, seminal event that created the cosmos churned up so much hot, thick gas that light was completely trapped. Much later—perhaps a...
Gamma-Ray Blazars Powered By Billion-Solar-Mass Black Holes Found
Using the Fermi Gamma-ray Space Telescopes, astronomers found 5 early universe gamma-ray blazars. Two of them were powered by “billion-solar-mass” black hole...
Vera Rubin, Astrophysicist Who Confirmed Existence Of Dark Matter, Dies At 88
The astrophysicist's groundbreaking research on spiral galaxies provided evidence of invisible dark matter. She was a pioneer in an era when women were excluded from many astronomy programs.
Quantum Physicists Probe Fabric of Spacetime to Solve Mystery of Dark Energy
One of the great mysteries of the cosmos is why it is expanding at an apparently accelerating rate. Physicists have suggested an outward force, dubbed "dark energy," causes this expansion, but they ha...
Astronomers find a ‘nearly-naked’ supermassive black hole
A close galactic encounter gave these astronomers an interesting discovery
The case for black holes being nothing but holograms just got even stronger
If anything can sum up just how little we truly know about the Universe, it’s black holes. We can’t see them because not even light can escape their gravitational pull, we have no idea what they’re ma...
A New ‘Einstein’ Equation Suggests Wormholes Hold Key To Quantum Gravity
A new Einsteinian equation, ER=EPR, may be the clue physicists need to merge quantum mechanics with general relativity.
X-ray Echoes Map a Black Hole’s Disk
Some 3.9 billion years ago in the heart of a distant galaxy, the tidal pull of a monster black hole shredded a star that wandered too close. X-rays produced ...
Dark matter may just be a bunch of ancient black holes
An invisible "dark matter" outweighs all the stars in space by 4:1. But gravitational waves may soon unmask the shadowy culprit.
Astronomers Have Detected Clouds Of Water Outside Our Solar System
Scientists have found a dwarf star "dominated by water vapor and clouds, with an overall appearance that is strikingly similar to Jupiter."
Soft hairs help resolve the black-hole information paradox
Stephen Hawking and colleagues claim partial solution to 40-year-old puzzle
Could black holes be the dark matter everyone has been looking for?
As we wait for more LIGO results, a maverick theory pops up
Elusive Dark Matter Galaxy Revealed By Cosmic Lens
An invisible dark-matter galaxy hides in the edges of another larger galaxy serving as a natural magnifying glass. Astronomers probing the sky used the gravity of a massive galaxy as a natural magnif...
Something Big Came OUT Of A Black Hole Recently! Scientists Baffled 3/15/16
NASA-just-saw-something-come-out-black-hole-first-time-ever .
After Black Holes Collide, a Puzzling Flash
A surprising flash that accompanied a black hole collision is leading physicists to rethink what black holes can do.
Are We Living in a Black Hole?
Some astrophysicists think our universe owes its origin to a monster black hole, wherein we reside today.
Gravitational lensing
A gravitational lens refers to a distribution of matter (such as a cluster of galaxies) between a distant source and an observer, that is capable of bending the light from the source, as it travels to...
Gravitational lensing - Wikipedia
Microlensing Observations in Astrophysics
Microlensing Observations in Astrophysics (MOA) is a collaborative project between researchers in New Zealand and Japan, led by Professor Yasushi Muraki of Nagoya University. They use microlensing to ...
Microlensing Observations in Astrophysics - Wikipedia
Dark matter behavior
Dark matter is a hypothetical kind of matter that cannot be seen with telescopes but accounts for most of the matter in the universe. The existence and properties of dark matter are inferred from its ...
Dark matter behavior - Wikipedia
Navarro-Frenk-White profile
The Navarro–Frenk–White (NFW) profile is a spatial mass distribution of dark matter fitted to dark matter haloes identified in N-body simulations by Julio Navarro, Carlos Frenk and Simon White. The NF...
Dark energy
In physical cosmology and astronomy, dark energy is an unknown form of energy which permeates all of space and tends to accelerate the expansion of the universe. Dark energy is the most accepted hypot...
Dark fluid
In astronomy and cosmology, dark fluid is an alternative theory to both dark matter and dark energy and attempts to explain both phenomena in a single framework.Dark fluid proposes that dark matter an...
Black hole
A black hole is a mathematically defined region of spacetime exhibiting such a strong gravitational pull that no particle or electromagnetic radiation can escape from it. The theory of general relati...
Black hole - Wikipedia
Brown dwarf
Brown dwarfs are substellar objects not massive enough to sustain hydrogen-1 fusion reactions in their cores, unlike main-sequence stars. They occupy the mass range between the heaviest gas giants and...
Brown dwarf - Wikipedia
Bullet Cluster
The Bullet Cluster (1E 0657-558) consists of two colliding clusters of galaxies. Strictly speaking, the name Bullet Cluster refers to the smaller subcluster, moving away from the larger one. It is at ...
Bullet Cluster - Wikipedia
Cuspy halo problem
The cuspy halo problem arises from cosmological simulations that seem to indicate cold dark matter (CDM) would form cuspy distributions — that is, increasing sharply to a high value at a central...
Dark galaxy
A dark galaxy is a hypothetical galaxy composed of dark matter. Dark galaxies receive their name because they have no detectable stars and are theoretically invisible. They are not able to generate st...
Dwarf galaxy problem
The dwarf galaxy problem, also known as the missing satellites problem, arises from numerical cosmological simulations that predict the evolution of the distribution of matter in the universe. Dark ma...