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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.).
With this orientation, the navigator can hold the star chart overhead, and the arrangement of the stars on the chart will resemble the stars in the sky. [1] In the star charts, constellations are labelled with capital letters and indicated by dotted lines collecting their stars.
The following lists of constellations are available: IAU designated constellations – a list of the current, or "modern", constellations; Former constellations – a list of former constellations; Chinese constellations – traditional Chinese astronomy constellations; List of Nakshatras – sectors along the Moon's ecliptic
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: ...
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However, at locations north of 43°N the constellation either drags along the southern horizon, or it does not rise at all. By contrast, in most of the southern hemisphere Sagittarius can appear overhead or nearly so. It is hidden behind the Sun's glare from mid-November to mid-January and is the location of the Sun at the December solstice.
On Earth, a pole star would lie directly overhead when viewed from the North or the South Pole. Currently, Earth's pole stars are Polaris (Alpha Ursae Minoris), a bright magnitude 2 star aligned approximately with its northern axis that serves as a pre-eminent star in celestial navigation , and a much dimmer magnitude 5.5 star on its southern ...
Illustration of the DSCS III satellite. The Defense Satellite Communications System (DSCS) [1] is a United States Space Force satellite constellation that provides the United States with military communications to support globally distributed military users.