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Proper names of planetary systems often follow common themes – for example, the planets of the star Copernicus are named after European astronomers. Proper names for planets outside of the Solar System – known as exoplanets – are chosen by the International Astronomical Union (IAU) through public naming contests known as NameExoWorlds.
The first report of an exoplanet within this range was in 1998 for a planet orbiting around Gliese 876 (15.3 light-years (ly) away), and the latest as of 2024 is one around GJ 1289 (27.3 ly). The closest exoplanets are those found orbiting the star closest to the Solar System, which is Proxima Centauri 4.25 light-years away.
Cobalt-60, 60 Co. Cobalt-60 ( 60 Co) is a synthetic radioactive isotope of cobalt with a half-life of 5.2714 years. [3] [4] : 39 It is produced artificially in nuclear reactors. Deliberate industrial production depends on neutron activation of bulk samples of the monoisotopic and mononuclidic cobalt isotope 59. . [5]
The term sol with a lower-case s is used by planetary astronomers for the duration of a solar day on another planet such as Mars. [ 21 ] The English weekday name Sunday stems from Old English Sunnandæg "sun's day", a Germanic interpretation of the Latin phrase diēs sōlis , itself a translation of the ancient Greek ἡμέρα ἡλίου ...
Some exoplanet candidates detected by radial velocity that were originally thought to be potentially habitable were later found to most likely be artifacts of stellar activity. These include Gliese 581 d & g, [53] [54] [55] Gliese 667 Ce & f, [14] [56] Gliese 682 b & c, [7] Kapteyn b, [57] [58] and Gliese 832 c. [59]
The Extrasolar Planets Encyclopaedia (also known as Encyclopaedia of exoplanetary systems and Catalogue of Exoplanets) is an astronomy website, founded in Paris, France at the Meudon Observatory by Jean Schneider in February 1995, which maintains a database of all the currently known and candidate extrasolar planets, with individual pages for ...
There are eight planets within the Solar System; planets outside of the solar system are also known as exoplanets . As of 25 July 2024, there are 5,741 confirmed exoplanets in 4,285 planetary systems, with 960 systems having more than one planet. [1] Most of these were discovered by the Kepler space telescope.
The first stable, non-beta version of Safari for Windows, Safari 3.1, [33] was offered as a free download on March 18, 2008. In June 2008, Apple released version 3.1.2, [ 34 ] [ 35 ] which addressed a security vulnerability in the Windows version where visiting a malicious web site could force a download of executable files and execute them on ...