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Hace 4 días · Astronomy, science that encompasses the study of all extraterrestrial objects and phenomena. Since the late 19th century, astronomy has expanded to include astrophysics, the application of physical and chemical knowledge to an understanding of the nature of celestial objects.
- The Techniques of Astronomy
Astronomy - Techniques, Observations, Measurements:...
- History of Astronomy
Astronomy - Ancient, Celestial, Observations: Astronomy was...
- The Rise of Astrophysics
Astronomy - Stars, Galaxies, Cosmology: In 1835 the French...
- The Steady-state Challenge
Astronomy - Steady State, Cosmology, Big Bang: In England,...
- Study of the Solar System
Astronomy - Solar System, Planets, Stars: The solar system...
- Cosmology
Cosmology, the field of study that brings together the...
- The Techniques of Astronomy
Hace 2 días · The Sun is the star at the center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, [18] [19] heated to incandescence by nuclear fusion reactions in its core, radiating the energy from its surface mainly as visible light and infrared radiation with 10% at ultraviolet energies.
Hace 4 días · A star is a luminous spheroid of plasma held together by self-gravity. [1] . The nearest star to Earth is the Sun. Many other stars are visible to the naked eye at night; their immense distances from Earth make them appear as fixed points of light.
Hace 3 días · The Moon is Earth 's only natural satellite. It orbits at an average distance of 384,400 km (238,900 mi), about 30 times the diameter of Earth. Over time Earth's gravity has caused tidal locking, causing the same side of the Moon to always face Earth.
Hace 2 días · Ancient lore and legend tell of the power of the Moon to instill spells with magic, to transform humans into beasts, and to send people’s behavior swaying perilously between sanity and lunacy (from the Latin luna, “Moon”).
- James D. Burke
Hace 3 días · May 31, 2024, 4:58 AM ET (BBC) James Webb: Earliest and most distant galaxy ever observed. May 23, 2024, 4:15 PM ET (AP) Massive cradle of baby stars revealed in new space telescope images. Top Questions. What is a galaxy? Are all galaxies the same shape? What are the types of galaxies? What is an example of a Sa galaxy?
Hace 4 días · Top Headlines. Martian Meteorites Deliver a Trove of Information on Red Planet's Structure. May 31, 2024 — Mars has a distinct structure in its mantle and crust with discernible reservoirs, and...
