most stars are made of mainly hydrogen, a little helium and traces of other gases like oxygen
All stars, including Sirius, are made up of hydrogen, carbon, and helium, mainly.
Right next to Sirius A. Both go around their common center of mass, once every 50 years.
hydrogen and helium.
No. Sirius is far from a cold star. Sirius is actually a binary system about 8.6 light years away. Sirius A is a white main sequence star just over twice the size of the sun. Sirius B is a white dwarf stellar remnant of about 0.978 solar masses. The temperature of the two stars are far higher than that of our sun. The sun is about 5778 Kelvin, Sirius A is almost twice that at 9,940 K and Sirius B is many times that at 25,200 K.
Neither. The Sun only appears bright because it is close. Sirius is far larger and brighter than our Sun. Our Sun is probably in the top 40% of all stars in the Milky Way, while Sirius is probably in the top 5%. But there are many other stars that are far brighter even that Sirius.
Sirius is not part of our Solar System, so it is not appropriate to talk about "other objects in the solar system".
If you weighed 100lb on Earth you would weigh about 5,400 lb for about a millisecond before you were incinerated and turned into vapour. Sirius A is a star about twice the size of our Sun.
Polaris - the current North star is a multiple star system., consisting of the main star and smaller companions. The main star Alpha Ursae Minoris is a bright star, a 6 solar mass supergiant and it is a main sequence star. Orbiting very close to this main star is a white dwarf of roughly 1.5 solar masses. This is not a main sequence star. Orbiting further out is the third companion, a 1.39 solar mass star. This is a main sequence star. There are also two more distant components (α UMi C and α UMi D) - Polaris is thought to be part of an open cluster - I do not know if these later two stars are main sequence or not.
Yes - Sirius is a blue-white star - the hottest type of star there is.
the dog star is called sirius and is located south west of Orion belts in the southern hemisphere
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. The North Star is Polaris. Sirius is known as the Dog Star.
Yes, Sirius is quite big while Barnard's star is small.
It is not real. Sirius is a two-star system containing only Sirius A and Sirius B.
No. Sirius is the brightest star in Earth's night sky, but how bright a star appears is a product of its actual brightness and its distance from us. Sirius itself is actually two stars with Sirius A emitting the vast majority of the system's light. Sirius A is a fairly large star, but others are much larger.
Sirius is the brightest star in the night sky, but the brightest overall is the sun.
No. There is no such thing as an "earth-like star" as Earth is a planet, not a star. Sirius A is a star that is larger and brighter than the sun.
Sirius is not a single star but a binary star system consisting of a white main sequence star and a white dwarf.
No. There is no such thing a a cold star. Sirius consists of two stars, both of which are hotter than the average star.
Yes, Sirius is about twice as massive as our sun, making it a medium mass star. It is quite a bit brighter, however, and is the second brightest star in our sky.