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Il y a 3 jours · Dark matter is a component of the universe that exerts gravitational attraction but emits no light. Learn about its existence, distribution, types, and possible candidates from Britannica's experts.
- Adam Riess
- Dark matter is a component of the universe whose presence is discerned from its gravitational attraction rather than its luminosity.
- Dark matter makes up 30.1 percent of the matter-energy composition of the universe. The rest is dark energy (69.4 percent) and “ordinary” visible m...
- Dark matter’s existence was first inferred by Swiss American astronomer Fritz Zwicky, who in 1933 discovered that the mass of all the stars in the...
- Two varieties of dark matter have been found to exist. The first variety is about 4.5 percent of the universe and made of the familiar baryons (i.e...
Il y a 5 jours · To learn about dark matter within a galaxy, scientists can look to its stars and their movements that are dominated by the pull of dark matter. A common approach to measure the speed of objects moving in space is by the Doppler Effect – an observed change of the wavelength of light if a star is approaching or receding from Earth ...
Il y a 5 jours · By analyzing NASA's Hubble Space Telescope data gathered over an almost two-decade span, astronomers have charted stellar movements within a galaxy and discovered the likely clumping of dark matter in its center.
Il y a 18 heures · In recent months, the company Satlantis has been developing a camera to photograph the dark matter in the universe. In reality, the set-up consists of four complementary high-precision devices, two of them with infrared light, on board a 300-kilogram satellite. These cameras will observe the structures around small galaxies to study the ...
Il y a 1 jour · Though dark matter is thought to make up roughly 85% of the matter in our universe, research shows that the cores of massive galaxies in the universe today contain mostly normal matter. To check whether the intriguing new JWST observations match our theoretical understanding of the universe’s evolution, and to explore how these dark matter ...
Il y a 3 jours · Dive into the world of tachyons, the elusive particles that might travel faster than light and hold the key to understanding dark matter and the universe's e...
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- NASASpaceNews
Il y a 3 jours · Dark Matter and Dark Energy. Read what astronomers are discovering about a gaping hole in the universe, how dark matter clumps contribute to galaxy formation and more. Space images.
