Sep 15, 2021 · No one knows yet if string theory is the ultimate theory--the theory of everything, if there is such a thing. But the theory's incredible elegance and potential make it a strong front-runner to …

Sep 23, 2021 · Another clue comes when astronomers map young, bright stars and clouds of ionized hydrogen in the Milky Way's disk. These clouds, called HII regions, are ionized by young, hot stars …

Dec 11, 2018 · WMAP Special Exhibit Formation of structure in the universe The Big Bang is the best theory we have about the origin of the universe, but this theory is far from complete. For example, in …

Sep 23, 2021 · Advanced Dark Matter When the Universe was young, it was nearly smooth and featureless. As it grew older and developed, it became organized. We know that our solar system is …

Nov 14, 2014 · Advanced Basic The Electromagnetic Spectrum The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes – …

Mar 27, 1998 · Physicists raise questions about the number of dimensions, and have theories for the Universe consisting of 11 dimensions. This, plus more familiar concepts such as the curvature of …

Sep 23, 2020 · The arrows (or vectors) show the direction of the circular velocity (v, always tangent to the circular path) and the circular acceleration (a) caused by a centripetal force. Centripetal means …

Cosmic Times Dr. Hubble's recent observations support Curtis' views. While bright, diffuse nebulae are relatively close and part of the Milky Way, spiral nebulae are separate systems located far away from …

Dec 8, 2017 · Cosmic Times Inflation in the Universe The Big Bang theory has a problem, say scientists. It can't go from a tiny ball of energy to the universe we see today without some help. It needs an …

Dec 11, 2018 · Explore a universe of black holes, dark matter, and quasars... A universe full of extremely high energies, high densities, high pressures, and extremely intense magnetic fields which …