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Thermal Radiation The Doppler Effect Telescopes Basic Optics Optical Telescopes Telescopes of Other Wavelengths Neutrino Telescopes Gravitational Wave Telescopes...

everything. In fact, aside from the exact chemical composition or the gravitational effects of companion stars, mass is the factor that determines the fate...

and how they are used to measure distances, in a later chapter, General Astronomy/The Death of High Mass Stars). This makes them very useful for measuring...

after recombination. Areas with slightly higher density had enough gravitational attraction to overcome expansion of the universe and collapsed into...

relativistic jets towards us Some galaxies [1] and quasars [2] Gravitational effects. See gravitational redshift Kuhn, Karl F. (2004). In Quest of the Universe...

Thermal Radiation The Doppler Effect Telescopes Basic Optics Optical Telescopes Telescopes of Other Wavelengths Neutrino Telescopes Gravitational Wave Telescopes...

In astronomy, the Pleiades, or seven sisters, (Messier object 45) are an open star cluster in the constellation of Taurus. It is among the nearest star...

Earth. Finally, gravitational redshifts are a relativistic effect observed in electromagnetic radiation moving out of gravitational fields. Conversely...

A black hole is an object that has a gravitational field so powerful that nothing, not even radiation or light, can escape. The event horizon is the name...

would disintegrate. The gravitational force causes mass to attract mass. More massive objects have a stronger gravitational field. The electromagnetic...

exoplanets: Astrometry, Radial Velocity, Pulsar timing, Transit method, Gravitational micro-lensing, Direct imaging. Three methods detect a dynamical perturbation...

longer maintain the necessary temperature, resulting in what is termed "gravitational collapse". The second possible cause of this imbalance between temperature...

can emit radiation of characteristic types before they fall through the event horizon. Any falling or orbiting object is subject to gravitational accelerations...

nature of this X-radiation was the same as that predicted to be produced from charged particles spiraling down through the gravitational field of an extremely...

This is shown by the density of matter, and cosmic background radiation. The radiation left over from the Big Bang is about 3 Kelvin. The rate of expansion...

distributed, and gravitational pulls on each speck would have balanced on every side. In such a case, there would have been no gravitationally caused condensation...

common center, and their very fast motions indicate an extremely strong gravitational attraction at that point. Using Newton's version of Kepler's laws, astronomers...

question, and a basic part of our grasp of the universe itself. To study astronomy, it’s essential to understand what’s out there, how everything relates...

because of retarded gravitational forces within a huge expanding shell with a large mass. For this purpose, the principles of gravitational potentials and...

Hawking radiation is a theoretical effect produced by black holes. The idea was first put forward in 1972 by Jacob Bekenstein, a research student at Princeton...