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  2. OGLE-2011-BLG-0462 - Wikipedia

    en.wikipedia.org/wiki/OGLE-2011-BLG-0462

    OGLE-2011-BLG-0462. OGLE-2011-BLG-0462, also known as MOA-2011-BLG-191, is a stellar-mass black hole isolated in interstellar space. OGLE-2011-BLG-0462 lies at a distance of 1,720 parsecs (5,610 light years) in the direction of the galactic bulge in the constellation Sagittarius. The black hole has a mass of about 6.03 M☉. [1]

  3. MOA-2011-BLG-262L - Wikipedia

    en.wikipedia.org/wiki/MOA-2011-BLG-262L

    0.11+0.21. −0.06 or 0.003 M☉. Mass. 115.2327 or 3.6+2.0. −1.7 MJup. Database references. SIMBAD. data. MOA-2011-BLG-262L is an astronomical object of uncertain nature with an orbiting companion, detected through the gravitational microlensing event MOA-2011-BLG-262 in the constellation Sagittarius.

  4. Microlensing Observations in Astrophysics - Wikipedia

    en.wikipedia.org/wiki/Microlensing_Observations...

    The Microlensing Observations in Astrophysics (MOA) telescope dome at the top of Mount John. Microlensing Observations in Astrophysics (MOA) is a collaborative project between researchers in New Zealand [ 1 ] and Japan, [ 2 ] led by Professor Yasushi Muraki of Nagoya University. [ 3 ] They use microlensing to observe dark matter, extra-solar ...

  5. Minute and second of arc - Wikipedia

    en.wikipedia.org/wiki/Minute_and_second_of_arc

    The nautical mile (nmi) was originally defined as the arc length of a minute of latitude on a spherical Earth, so the actual Earth circumference is very near 21600nmi. A minute of arc is ⁠π/10800⁠ of a radian. A second of arc, arcsecond (arcsec), or arc second, denoted by the symbol ″, [ 2 ] is ⁠1/60⁠ of an arcminute, ⁠1/3600⁠ of ...

  6. Laser broom - Wikipedia

    en.wikipedia.org/wiki/Laser_broom

    A laser broom is a proposed ground-based laser beam-powered propulsion system that sweeps space debris out of the path of artificial satellites (such as the International Space Station) to prevent collateral damage to space equipment. It heats up one side of the debris to shift its orbit trajectory, altering the path to hit the atmosphere sooner.

  7. Massive Online Analysis - Wikipedia

    en.wikipedia.org/wiki/Massive_Online_Analysis

    Cross-platform. Type. Machine Learning. License. GNU General Public License. Website. moa.cms.waikato.ac.nz. Massive Online Analysis (MOA) is a free open-source software project specific for data stream mining with concept drift. It is written in Java and developed at the University of Waikato, New Zealand.

  8. Crested moa - Wikipedia

    en.wikipedia.org/wiki/Crested_Moa

    The crested moa ( Pachyornis australis) is an extinct species of moa. It is one of the 9 known species of moa to have existed. [3] Moa are grouped together with emus, ostriches, kiwi, cassowaries, rheas, and tinamous in the clade Palaeognathae. Some of the species of this group are flightless and lacks a keel on their sternum. [4]

  9. Ceefax - Wikipedia

    en.wikipedia.org/wiki/Ceefax

    Ceefax (/ ˈ s iː f æ k s /) was the world's first teletext information service and a forerunner to the current BBC Red Button service. Ceefax was started by the BBC in 1974 and ended, after 38 years of broadcasting, at 23:32:19 BST (11:32 PM BST) on 23 October 2012, in line with the digital switchover completion in Northern Ireland.