Observational astronomy 3.1 Radio astronomy 3.2 Infrared astronomy 3.3 Optical astronomy 3.4 Ultraviolet astronomy 3.5 X...
Most objects in the universe produce some amount of infrared radiation, but infrared observatories are especially useful...
Earth, creating a solar eclipse . If the Moon lines up with Earth and the Sun at the full moon (when Earth is between th...
H-R diagram, above the main sequence, stars are brighter than main-sequence stars of the same color. The only way stars ...
Orion . Few constellations look like their namesakes. Rather, ancient astronomers probably simply named areas of the sky...
Gamma-Ray Astronomy ; X-Ray Astronomy . A 3 Ultraviolet Astronomy Ultraviolet light has wavelengths longer than X rays, ...
Sun, from collisions in the atmosphere, and from the decay of radioactive elements. Many muon neutrinos also reach Earth...
