And if we are looking at a binary star, then it's not Earth's sun.

It is a binary star approximately 50 light years away from Earth.

Within the system, there are two separate systems of binary stars.

The binary star has a rotation period of 4.82 days.

A binary star is two stars which orbit around each other.

Two stars that orbit close to each other are called binary star.

He is most famous for the discovery and study of close binary stars.

In the center of the image were small, circling binary stars.

Like the sky at night, and there are two bigger than the rest, probably those binary stars.

As a result, this small companion probably formed like a binary star.

That means there must be a double star behind him.

I wonder if it couldn't be used to break up a double star?

She looked for a bright double star, blue and white.

In certain of the so called double stars, he, no doubt, did find a movement.

He started with his observations of double stars in 1925.

South then continued and observed another 458 double stars over the following year.

I hope to meet you here when the double star has turned one turn.

And you'll have a chance to witness the birth of a double star.

It is therefore in many ways the most interesting double star under observation.

"Head straight away from the double star," came the order in his helmet phone.