- Classical planet
- Our Solar System – National Radio Astronomy Observatory
Classical planet
• v • t • e A classical planet is an seven classical planets (the seven luminaries). They are from These classical planets were recorded during planēs and πλανήτης planētēs), expressing the fact that these objects move across the Through the use of planet is used considerably differently, with a History [ ] See also: The Babylonians recognized seven planets. A bilingual list in the British Museum records the seven Babylonian planets in the following order: Sumerian language Akkadian language Syriac Language Mandaic Language English language Presiding deity Sin Sin/Sahra Moon Šamaš Šemša Sun Umun-sig-êa Bel Jupiter Dele-bat Istra/Dlibat Venus Lu-bat-sag-uš Kewan Saturn Lubat-gud Navo Mercury Muštabarru Nirig/Nergal Mars In The same seven planets, along with the ascending and descending lunar node, are mentioned in Symbols [ ] Main articles: The ) for the Sun and a crescent for the Moon. A. S. D. Maunder finds antecedents of the planetary symbols in earlier sources, used to represent the gods associated with the classical planets. Bianchini's Compendium of Astrology shows the Sun represented by the circle with a ray, Jupiter by the letter zeta (the initial of Planetary hours [ ] Main articles: The The first hour of each day was named after the ruling planet, giving rise to the names and order of the Roman Miércoles is Mercury, and in French mardi is Mars-day. The modern English days of the week were mostly inherited from gods of the old Germanic Norse culture – Wednesday is ...
Our Solar System – National Radio Astronomy Observatory
Jupiter in radio waves looks like a giant lizard due to the powerful magnetic field surrounding it. Charged particles erupted from its moons are captured by this field and give off radio waves. We aim radio telescopes at the Sun, planets, moons, and planetesimals in our Solar System. Used as telescopes, they tell us about the temperature, composition, and magnetic activities of these bodies. Used as radar devices, they map surfaces, obtain distances, and clock spins and speeds. Used as receiving stations, they help NASA and other space agencies keep track of spacecraft sent into the outer reaches of our Solar System. Storm Tracking on the Sun The surface of the Sun is a strong source of radio emission – and of potential harm, so our 45-foot telescope in Green Bank, West Virginia monitors the Sun the entire time it is in our sky. The Sun, like most stars, has a gigantic magnetic field. As the Sun spins, its surface wraps the field into swirls, tangling it. To regain order, field lines reconnect at the congestion points, snapping off unwanted threads and loops to make shorter, direct paths from pole to pole. Any material still clinging to the cast-offs is carried away as a wave of charged solar material. We call these solar flares. When the discarded loops are large enough to explode off into the Solar System, they are called coronal mass ejections (CMEs). These tsunamis of charged particles can interrupt radio communications on the Earth, fry sensitive equipment in satellit...
