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The night sky is the nighttime appearance of celestial objects like stars, planets, and the Moon, which are visible in a clear sky between sunset and sunrise, when the Sun is below the horizon. Natural light sources in a night sky include moonlight , starlight , and airglow , depending on location and timing.
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)
Stars in the night sky. The first star catalogue in Greek astronomy was created by Aristillus in approximately 300 BC, with the help of Timocharis. [10] The star catalog of Hipparchus (2nd century BC) included 1,020 stars, and was used to assemble Ptolemy's star catalogue. [11] Hipparchus is known for the discovery of the first recorded nova ...
Tokyo started seeing the parade first, on Feb. 22, according to Star Walk, a sky-gazing app. New York will have the best view of the event on Feb. 25, Star Walk said. New York will have the best ...
Today, Venus is referred to as the "Christmas Star" because it will be the brightest object in the sky, besides the moon and sun, Throop said. PHOTO: Starry sky (Picture Alliance/DPA via Getty Images)
An alignment of six planets will dazzle in January 2025. Venus, Mars, Jupiter, Saturn, Uranus and Neptune will align in the night sky. "The whole month of January is a great time to see the ...
Fifth brightest star in the night sky. [71] Altair (α Aquilae) 2.01 × 1.57 [104] Twelfth brightest star in the night sky. Sirius (α Canis Majoris A) 1.713 [105] AD The brightest star in the night sky. Rigil Kentaurus (α Centauri A) 1.2175 [106] AD Third brightest star in the night sky. Sun: 1: The largest object in the Solar System.
It is the brightest star in the constellation and the third-brightest in the night sky, outshone by only Sirius and Canopus. α Centauri A (Rigil Kentaurus) has 1.1 times the mass (M ☉) and 1.5 times the luminosity of the Sun (L ☉), while α Centauri B (Toliman) is smaller and cooler, at 0.9 M ☉ and less than 0.5 L ☉. [15]