Many ideas like axions and sterile neutrinos were proposed, and many experiments like DAMA and LUX have been designed to understand dark matter. Yet, scientists still don’t know what exactly dark matter is. […]
Looking for mysterious dark matter requires a lot of studies and using some detection techniques, including direct and indirect detection, as well as using particle accelerators. […]
Physicists have used three experimental approaches to search for dark matter in which the interaction of dark matter with ordinary matter is assumed. […]
The universe, when examined using the doppler shift, does seem to support the observation that it is expanding, with galaxies moving, some away and some toward us. However, there’s no unique ‘center’ of the expansion. […]
Newton’s theorem, used to calculate rotation velocity, applies to elliptical galaxies. It doesn’t apply to flat disks as, in order to do so, one has to do integrals involving modified Bessel functions of the second kind. […]
When it comes to understanding the relationship between an active galaxy and a black hole, it is one of cause and effect. There is a negative feedback between the black hole and the surrounding galaxy as when the galaxy grows too fast, the black hole produces out-flows that halt any further growth. […]
Accreting black holes at the center of a galaxy are slightly more massive. Gas is funneled toward the innermost edge of the accretion disk. The gas is hot, ionized, plasma and is likely to turn into a tangled internal magnetic field. […]
Where did Earth’s Moon come from and how did it form? The nearest celestial body shines big, bright, and round in the sky, but how did it get there? Humanity’s renewed interest in the Moon raises questions. […]
Kepler’s laws of planetary motion are not really laws of physics. To understand the reason behind these laws, we need to consider Newton’s law of motion. […]
Kepler’s second and third laws are about how fast the planets move and about the time required to go around the orbit, respectively. His third law helps measure the mass of everything in astrophysics. […]
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