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An online star chart; Monthly sky maps for every location on Earth Archived 2007-09-13 at the Wayback Machine; The Evening Sky Map – Free monthly star charts and calendar for northern hemisphere, southern hemisphere, and equatorial sky watchers. Sky Map Online – Free interactive star chart (showing over 1.2 million stars up to magnitude 12)
Sunday, 5 February: The green comet will be near the star Capella in the constellation Auriga, however the full Moon may obstruct the view Details on the green comet Wednesday 1 February 2023 22: ...
The constellation contains 85 stars of naked eye visibility. [6] [7] The brightest star in Gemini is Pollux, and the second-brightest is Castor. Castor's Bayer designation as "Alpha" arose because Johann Bayer did not carefully distinguish which of the two was the brighter when he assigned his eponymous designations in 1603. [8]
The International Astronomical Union (IAU) designates 88 constellations. [1] In the table below, they are listed by geographical visibility according to latitude as seen from Earth, as well as the best months for viewing the constellations at 21:00 (9 p.m.).
The constellation Cassiopeia as it can be seen by the naked eye from a northern location. The German cartographer Johann Bayer used the Greek letters Alpha through Omega, and then A and B, to label the most prominent 26 stars in the constellation. Upsilon was later found to be two stars and labelled Upsilon 1 and Upsilon 2 by John Flamsteed.
Other bright stars in the constellation include β Ophiuchi, Cebalrai ("dog of the shepherd") [12] and λ Ophiuchi, or Marfik ("the elbow"). [13] Beta Ophiuchi is an evolved red giant star that is slightly more massive than the Sun. [14] [15] Lambda Ophiuchi is a binary star system with the primary being more massive and luminous than the Sun ...
The Constellations 1 – Ian Ridpath's list of constellations. Ian Ridpath's Star Tales: Constellation Mythology and History – Ian Ridpath's Star Tales. VizieR – CDS's archive of constellation boundaries. The text file constbnd.dat gives the 1875.0 coordinates of the vertices of the constellation regions, together with the constellations ...
All stars but one can be associated with an IAU (International Astronomical Union) constellation. IAU constellations are areas of the sky. Although there are only 88 IAU constellations, the sky is actually divided into 89 irregularly shaped boxes as the constellation Serpens is split into two separate sections, Serpens Caput (the snake's head) to the west and Serpens Cauda (the snake's tail ...