The brightest star in the sky
For a definite answer to the question, what is the brightest star in the sky, rely on different ways of measuring the brightness of these heavenly bodies. Because there are several ways to measure and from different points of view to make a definite rating of the brightest stars is almost impossible, that define how bright a celestial body appears to be on our planet. Although the most accurate value, studying the brightness of stars, there is an absolute (i.e. what the object looks like from a distance of 10 parsecs). Previously, many people were wrong, believing that the brightest star is polar. However, his «shining» to this star is behind Sirius, and in the urban night sky due to the light of lanterns to find the North star is problematic. Let’s see after all, what is the brightest star in the night sky beckons with its magical glow.
1 the Sun
Among the most striking of the heavenly bodies it is impossible not to mention the Sun, which ideally sustains life on our planet. It really shines, however, on the scale of the entire Universe it’s not very big and bright. If you find the absolute value, the setting of the Sun is equal to 4.75. This means that if a heavenly body were located 10 parsecs, it is unlikely that you would notice with the naked eye. There are other stars, which by its dimensions is much more our heavenly bodies, and, therefore, and Shine much brighter.
Represents the bright star that can be observed from Earth. It is perfectly visible from almost all points of the planet, but best of all it can be observed in the Northern hemisphere winter. People considered Sirius for a long time. For example, the Egyptian people with the help of this star was determined, when it begins to overflow the river Nile and when it is necessary to start sowing. Greeks from the star count was carried out approximation of the most hottest days of the year. Equally important Sirius was considered for navigators who help navigate the sea. To find Sirius in the night sky, just mentally draw a line between the three stars of Orion’s belt. While one end of the line will abut the Aldebaran, and the second – in Sirius that is unusually bright glow.
This star while in the constellation Canis major, is twofold. It is located from the Earth at a distance of eight light years. This is a bright star with Sirius A (bright and large) and Sirius B (a white dwarf), which suggests that the star is a system.
This star, though not as well known as the Sirius, but is second in brightness. With our country this star is almost impossible to see (like almost the whole Northern hemisphere). However, in the southern hemisphere, Canopus is a kind of guiding star, which is used as a pointer directs sailors. In Soviet times, for ostrogorskii this star was a major, and Sirius was used as a backup to the stars.
This star, which is located in the Tarantula nebula, without special equipment it is impossible to see. And all because from Earth it is located far in the distance 165000 light years. But, nevertheless, it is the most visible and one of the biggest stars, are now known in our Universe. This star in brightness exceeding the Sun’s light into 9000000 times, and most of it she’s in a 10000000 times. Is the star with such a strange name class blue giants, which are a rather more uncommon. Since such stars are very small, they cause genuine interest of scientists. Most researchers are interested in what will become a star after his death, and model various options.
5 VY Canis major
The biggest star which is the brightest. The size of VY Canis were identified relatively recently. If you place this star in the Central part of the Solar system, the region can close the orbit of Jupiter, a little before reaching the orbit of Saturn. And if you draw a circle of stars in a line, in order that the light has overcome this distance to not less than 8-5 hours. The diameter of this celestial object larger than the diameter of the Earth two thousand times. And, despite the fact that the density of stars is small enough (0.01 g/m3), this object is also considered to be bright enough.