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The Astronomy Portal

Astronomy is the scientific study of matter in outer space with the goal of determining or measuring factors such as distances, positions, dimensions, distribution, magnitudes, motion, composition, physical condition, energy, evolution, and the causes of their various phenomena. At present astronomy while making some important discoveries is still in its infancy in terms of gaining depth of understanding and some would argue has many errant notions.

Important branches in this discipline include astrophysics and cosmology. Astrophysics is a branch of astronomy that deals with the physics of stellar phenomena. Cosmology is the study of the origin, current state, and future of the cosmos. Astrophysical measurements and analysis are used to understand the cosmological history, structure, and constituent dynamics of our universe.


Selected article

Dark energy
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Dark energy is one of two concepts (the other is dark matter) that Big Bang cosmologists and astrophysicists have invented to explain the most serious differences to date between astronomical observations of an expanding universe and their own expectations. It is "the most popular way to explain recent observations that the universe appears to be expanding at an accelerating rate";[1] Astronomers and cosmologists have been speculating on the nature of this dark energy for ten years.


Selected picture

Barred Spiral Galaxy NGC 1300

Explanation: Big, beautiful, barred spiral galaxy NGC 1300 lies some 70 million light-years away on the banks of the constellation Eridanus. NGC 1300 spans over 100,000 light-years and the Hubble image reveals striking details of the galaxy's dominant central bar and majestic spiral arms. In fact, on close inspection the nucleus of this classic barred spiral itself shows a remarkable region of spiral structure about 3,000 light-years across. Unlike other spiral galaxies, including our own Milky Way, NGC 1300 is not presently known to have a massive central black hole.


Selected biography

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The National Aeronautics and Space Administration began on October 1, 19581 October 1958 17 Tishrei 5719 H 18 Eitanim 6117 AM, by an act of the United States Congress to establish an American presence in outer space. Today it is the foremost among government agencies that manage space programs, and is credited with some of the most exciting and surprising astronomical discoveries ever made.



“We cannot even show convincingly how galaxies, stars, planets, and life arose in the present universe.” Michael Rowan-Robinson, “Review of the Accidental Universe,” New Scientist, Vol. 97, 20 January 1983, p. 186.[1]

“The problem of explaining the existence of galaxies has proved to be one of the thorniest in cosmology. By all rights, they just shouldn’t be there, yet there they sit. It’s hard to convey the depth of frustration that this simple fact induces among scientists.” James Trefil, The Dark Side of the Universe. A Scientist Explores the Mysteries of the Cosmos, New York Charles Scibner's Sons: 1988, page 55.

“We don’t understand how a single star forms, yet we want to understand how 10 billion stars form.” Carlos Frenk, as quoted by Robert Irion, “Surveys Scour the Cosmic Deep,” Science, Vol. 303, 19 March 2004, p. 1750.



AstronomyAstronomy groupAstrophysicsCosmic chronologyCosmologyDwarf planetGalaxyMoonNebulaPlanetRocket probeSolar systemSpace missionCosmology bookCosmology video


Semantic properties

ApoapsisAxial tiltCircumferenceDwarf planet massDwarf planet surface areaEquatorial radiusEscape speedInclinationLand areaLunar massLunar surface areaMaximum temperatureMean orbital radiusMean radiusMean temperatureMinimum temperatureOrbital eccentricityOrbital speedPeriapsisPlanet densityPlanet massPlanet surface areaPolar radiusPrimaryRotation speedSatelliteSemi-major axisSidereal daySidereal periodSolar dayStellar massStellar surface areaSurface gravitySynodic periodWater area



A, Albedo, Anthropic principle, Apsis, Ariel, Asteroid, Astronomy, Astronomy and the Bible, Astronomy Book, The, Astronomy quotes, Astrophysics, Axial tilt, B, Big bang, Black hole, C, C-type asteroid, Callisto, Ceres, Charon, Comet, Copernican principle, Cosmic background radiation, Cosmic center, Cosmic chronology, Cosmology, Cosmos, Creation in secular journal (cosmology), Creation cosmology, D, Dark energy, Dark matter, Day, Days of creation, Deimos, Dione, Dwarf planet, Dysnomia, E, Earth, Enceladus, Equinox, Equinox precession, Eris, Escape speed, Essay:Victorious Biblical Astronomy, Extraterrestrial life, Europa, Evolution, F, First light, Four firmaments, 4th Day Alliance, G, Galactocentricity, Galaxy, Ganymede, Gas giant, Geocentricity, Geomagnetic field decay, Geomagnetic reversal, Geomagnetism, God and Cosmos, Gravitational lens, Gravitational time dilation, H, Heaven, Heliocentricity, Helioseismology, Hubble Space Telescope, Hubble's Law, Hydra, Hyperion, I, Iapetus, Impact crater, Inclination, International Space Station, Io, J, Jet Propulsion Laboratory, Jupiter, K, Kuiper belt, L, Lunar eclipse, M, M-type asteroids, Magnetosphere, Major asteroids, Mars, Mass, Mercury, Meteorite, Mimas, Miranda, Moon, Moon is receding at a rate too fast for an old universe, Moon recession, N, National Aeronautics and Space Administration, Nebula, Nebula theory, Nemesis, Neptune, Nereid, Nix, Nuclear fusion, O, Oberon, Orbit, Orbital eccentricity, Orbital period, Oort cloud, Our Created Moon, P, Phobos, Planet, Planet-moon system, Pluto, Q, Quasar, R, Redshift, Redshift quantization, Retrograde motion, Rhea, Rotation, Rotation speed, S, S-type asteroids, Saturn, Scattered disk, Sedna, Semi-major axis, Snowball earth, Solar flare, Solar system, Solar wind, Speed of light, Star, Starlight and Time, Starlight, Time and the New Physics, Star formation, Star of Bethlehem, Stellar evolution, Stellar measurement, Sun, Supernova, Supernova remnant, Surface area, T, Temperature, Terrestrial planet, Tethys, The Astronomy Book, The Witness of the Stars, Tidal lock, Titan, Titania, Titius-Bode Law, Trans-Neptunian Objects, Transient lunar phenomena, Triton, U, Umbriel, Universe, Universe by Design, Uranus, V, Venus, Voyager 2, Vulcan, W, White hole cosmology, Y, Young earth evidence, Young solar system evidence, Young universe evidence



S Same evidence with different worldviews V Victorious Biblical Astronomy


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