• Thumbnail for Solar core
    The core of the Sun is considered to extend from the center to about 0.2 of the solar radius (139,000 km; 86,000 mi). It is the hottest part of the Sun...
    14 KB (1,894 words) - 21:58, 8 September 2024
  • Thumbnail for Sun
    Sun (redirect from Solar diameter)
    center of the Solar System. It is a massive, nearly perfect sphere of hot plasma, heated to incandescence by nuclear fusion reactions in its core, radiating...
    170 KB (19,226 words) - 01:37, 20 September 2024
  • Thumbnail for Formation and evolution of the Solar System
    dense cores 0.01–0.1 parsec (2,000–20,000 AU) in size. One of these collapsing fragments (known as the presolar nebula) formed what became the Solar System...
    113 KB (13,507 words) - 05:08, 19 September 2024
  • Thumbnail for Solar neutrino
    A solar neutrino is a neutrino originating from nuclear fusion in the Sun's core, and is the most common type of neutrino passing through any source observed...
    27 KB (3,271 words) - 15:41, 12 June 2024
  • Planetary core, the center of a planet Earth's inner core Earth's outer core Stellar core, the region of a star where nuclear fusion takes place Solar core, Core...
    6 KB (771 words) - 06:45, 31 May 2024
  • Thumbnail for Alpha particle
    Alpha particles, also called alpha rays or alpha radiation, consist of two protons and two neutrons bound together into a particle identical to a helium-4...
    31 KB (3,829 words) - 19:38, 9 September 2024
  • Thumbnail for Solar wind
    The solar wind is a stream of charged particles released from the Sun's outermost atmospheric layer, the corona. This plasma mostly consists of electrons...
    55 KB (6,593 words) - 20:25, 8 September 2024
  • Thumbnail for Sunlight
    Sunlight (redirect from Solar output)
    of the electromagnetic spectrum. Although the radiation created in the solar core consists mostly of x rays, internal absorption and thermalization convert...
    52 KB (5,643 words) - 17:08, 25 June 2024
  • The solar neutrino problem concerned a large discrepancy between the flux of solar neutrinos as predicted from the Sun's luminosity and as measured directly...
    12 KB (1,604 words) - 15:30, 18 September 2024
  • Thumbnail for Earth's outer core
    early Solar System, so differences between CI meteorites and BSE can provide insights into the light element composition of Earth's outer core. For instance...
    24 KB (2,368 words) - 15:39, 27 August 2024
  • Thumbnail for Radiation zone
    monotonically with mass, with stars around 1.2 solar masses being almost entirely radiative. Above 1.2 solar masses, the core region becomes a convection zone and...
    11 KB (1,764 words) - 22:13, 8 September 2024
  • Thumbnail for Future of Earth
    occurs in the core region of the star using the proton–proton chain reaction process. Because there is no convection in the solar core, the helium concentration...
    98 KB (10,937 words) - 03:04, 20 September 2024
  • molten core has somehow stopped rotating. Unless restarted, the field is set to collapse within months, exposing the surface to devastating solar radiation...
    20 KB (2,107 words) - 05:16, 12 September 2024
  • Thumbnail for Solar System
    The Solar System is the gravitationally bound system of the Sun and the objects that orbit it. It was formed about 4.6 billion years ago when a dense...
    222 KB (21,916 words) - 18:42, 23 September 2024
  • Thumbnail for Carrington Event
    geomagnetic storm in recorded history, peaking on 1–2 September 1859 during solar cycle 10. It created strong auroral displays that were reported globally...
    46 KB (4,724 words) - 14:43, 19 September 2024
  • Thumbnail for Star
    active life due to the thermonuclear fusion of hydrogen into helium in its core. This process releases energy that traverses the star's interior and radiates...
    147 KB (16,412 words) - 12:11, 7 September 2024
  • Thumbnail for Convection zone
    convection zone may reach all the way from the core to the surface. In main sequence stars of less than about 1.3 solar masses, the outer envelope of the star...
    7 KB (837 words) - 22:35, 8 September 2024
  • Thumbnail for Neutrino
    fusion in the Sun pass through the dense matter in the solar core (where essentially all solar fusion takes place) on their way to detectors on Earth...
    141 KB (14,036 words) - 01:29, 23 September 2024
  • Thumbnail for Nebular hypothesis
    explain the formation and evolution of the Solar System (as well as other planetary systems). It suggests the Solar System is formed from gas and dust orbiting...
    75 KB (9,132 words) - 21:54, 8 August 2024
  • helium core: a thin CNO cycle inner shell and an outer pp chain shell. Solar core Stellar evolution Pradhan & Nahar 2008, p. 624 harvnb error: no target:...
    15 KB (1,845 words) - 05:26, 29 January 2024
  • Thumbnail for Solar power
    solar cells have become commercially attractive. Core problems and research subjects include their short- and long-term stability. Concentrated solar...
    89 KB (9,108 words) - 07:53, 27 September 2024
  • Thumbnail for Perovskite solar cell
    efficiencies and very low production costs, perovskite solar cells have become commercially attractive. Core problems and research subjects include their short-...
    185 KB (20,955 words) - 19:36, 6 September 2024
  • Thumbnail for Earth's magnetic field
    alloys of its core, created by convection currents due to heat escaping from the core. The Earth and most of the planets in the Solar System, as well...
    78 KB (8,953 words) - 15:48, 20 September 2024
  • Thumbnail for Planetary core
    Earth. In the Solar System, core sizes range from about 20% (the Moon) to 85% of a planet's radius (Mercury). Gas giants also have cores, though the composition...
    36 KB (4,405 words) - 16:18, 18 July 2024
  • Thumbnail for Outline of the Solar System
    Structure of the Sun Solar core Radiative zone Convection zone Photosphere Chromosphere Corona Solar granulation Sunspots Solar prominences Solar flares Physical...
    12 KB (1,050 words) - 22:56, 21 August 2024
  • Thumbnail for Ganymede (moon)
    with an iron-rich, liquid metallic core, giving it the lowest moment of inertia factor of any solid body in the Solar System. Its internal ocean potentially...
    112 KB (10,722 words) - 13:15, 24 September 2024
  • Thumbnail for Mercury (planet)
    Mercury (planet) (category Solar System)
    Mercury is the first planet from the Sun and the smallest in the Solar System. In English, it is named after the ancient Roman god Mercurius (Mercury)...
    155 KB (15,913 words) - 09:36, 13 September 2024
  • Thumbnail for Tachocline
    0.70 times the solar radius (measured from the core, i.e., the surface is at 1 solar radius), with a thickness of 0.04 times the solar radius. This would...
    4 KB (510 words) - 22:31, 8 September 2024
  • rigidly-rotating core and differentially-rotating envelope. The boundary layer is now known as the tachocline and is thought to be a key component for the solar dynamo...
    51 KB (5,445 words) - 19:06, 21 August 2024
  • Thumbnail for Solar mass
    occurring within its core, leading to the emission of electromagnetic energy, neutrinos and by the ejection of matter with the solar wind. It is expelling...
    14 KB (1,613 words) - 02:06, 8 September 2024