Sirius A a white main sequence star is the brightest star in the night sky as seen from Earth and has been known of since there has been astronomy and possibly even before that.
It's dimmer partner Sirius B a white dwarf was first theorised in 1844 by German astronomer Friedrich Bessel based on changes in the proper motion of Sirius A. In 1862 the US astronomer Alvin Graham Clark first observed the white dwarf.
Since 1896 close observations have also suggested that there is a 3rd star or possibly a brown dwarf stellar object in the system of about 0.06 solar masses. However studies done in 2008 now seem to have dispelled this idea.
In 1844, the German mathematician and astronomer, Friedrich Wilhelm Bessel studied the motion of Sirius A and predicted a smaller, fainter companion star. The existence was confirmed in 1862, when Alvan Graham Clark discovered the faint companion.
Since Sirius is recorded in the earliest astronomical records, it's discovery was in ancient times
Sirius is one of the brighter stars in our sky, and is easily visible without a telescope. It has been known since the first man looked up at night.
It can be argued that Harry did, because he SAW Sirius before getting on the Knight Bus. He didn't know then, however, that the dog he saw was Sirius. He just thought it was a dog. After he learned who Siruis Black was however, the first one to see Sirius was Ron. Peter Pettigrew, disguised as Ron's rat, Scabbers, led him into the Whomping Willow and then Harry and Hermione followed.
Sirius is a binary star system Sirius A and Sirius B.The distance separating Sirius A from B varies between 8.1 and 31.5 AU. (See related question).
No, but Sirius B is,
Sirius, which consists of both Sirius A and Sirius B is in the constellation Canis Major, which, if you are looking south, appears below and to the left of Orion. Sirius B itself is too dim to be seen from Earth; the vast majority of the light from Sirius is from Sirius A. Even then, as a binary system, the two stars are too close together for us to see them separately.
Sirius is actually a binary star system. Sirius A has an apparent magnitude of -1.46 whereas Sirius B has an apparent magnitude of 8.3
Look up the Wikipedia article, "Sirius", for more details. Briefly, it is: the brightest star in the sky (however, some planets, which also look like stars, are brighter); 8.6 light-years away; a double star; one of the components (Sirius B) was the first white dwarf to be discovered.
Sirius A and B were never discovered. They have been in the night sky since humanoids first roamed the Earth. Even the dinosaurs would have seen Sirius. So no one, or creature can be said to have "discovered" Sirius.
Sirius is Harry's godfather. Sirius Black is Harry's godfather.Harry is sirius's Godson.
It is not real. Sirius is a two-star system containing only Sirius A and Sirius B.
It can be argued that Harry did, because he SAW Sirius before getting on the Knight Bus. He didn't know then, however, that the dog he saw was Sirius. He just thought it was a dog. After he learned who Siruis Black was however, the first one to see Sirius was Ron. Peter Pettigrew, disguised as Ron's rat, Scabbers, led him into the Whomping Willow and then Harry and Hermione followed.
Sirius is a binary star system Sirius A and Sirius B.The distance separating Sirius A from B varies between 8.1 and 31.5 AU. (See related question).
No. Sirius consists of two stars. Sirius A is larger than the sun but is not a giant. Sirius B is a white dwarf,
No, but Sirius B is,
The Alan Parsons Project - Sirius
Sirius, which consists of both Sirius A and Sirius B is in the constellation Canis Major, which, if you are looking south, appears below and to the left of Orion. Sirius B itself is too dim to be seen from Earth; the vast majority of the light from Sirius is from Sirius A. Even then, as a binary system, the two stars are too close together for us to see them separately.
Sirius is actually a binary star system. Sirius A has an apparent magnitude of -1.46 whereas Sirius B has an apparent magnitude of 8.3
The temperature of Sirius A is about 9,940K (or 9,666.85C).