They vary. Less than an hour to hundreds of years have been accurately determined. Periods of many thousand years have been calculated, but these are based on a fraction of the data and thus are preliminary.
No. Betelgeuse is a single star.
When two stars are orbiting each other, it is called a binary star system. The stars revolve around a common center of mass due to their gravitational interaction. Binary star systems provide valuable information about stellar properties and evolution.
By definition, a binary star system has two stars in it.
Rigel is a triple star system.
"Occulting binary". The word "occult" means hidden or in shadows; if a binary star's orbital plane happens to be exactly through the Earth's path, we might see two stars when they're separate and then see one of the stars disappear behind (or in front of) the other.
Binary pairDouble starOptical double star
Binary Star - band - was created in 1998.
Generally the main star as this will have the most mass. However, temperature is not necessarily based on mass, so a secondary unit, could well be hotter but less massive.
A binary star system is two stars that orbit around each other
Waterworld - Binary Star album - was created in 1999.
It is a binary star
Star system with 2 star called? binary star system
That's an 'eclipsing binary'.
Yes. No, it is called a binary system.
Mass
No. Betelgeuse is a single star.
One method to determine the mass of each star in a binary star system is by studying their orbital motion. By observing the period and separation of the stars' orbits, astronomers can calculate the masses using Kepler's laws of planetary motion and Newton's law of universal gravitation.