proper motion

And together we'll have enough baseline for the proper motion study.

The proper motion of this star has been known for some time but it was thought to be much further away.

Proper motion is an object's change in position over time when seen from the Earth.

The stars share the same proper motion so they are probably related.

I answer you that by the proper motion of the stars alone it would have been difficult.

They had even moved a few of them slightly, a year ago, to correct for proper motion.

This system is also known for its high proper motion of about 1 arc second a year.

This star is also notable for its large proper motion.

Only seven stars with such large proper motions are currently known.

There were only about 100,000 stars for which proper motion could not be derived.

It has a relatively high proper motion and is located within 27 light years of the Sun.

The two stars have the same proper motion, so they may be physically associated.

No second after a proper motion will be required to bring any issue or recommendation to a vote.

Proper motion is the name for the way the stars seem to slowly move relative to each other when seen from Earth.

Also, eight of the ten stars with the biggest proper motions are less than 15 light years away.

The same spacecraft also measured the proper motion of this system.

His body went through the proper motions like an automaton.

"Of course, you're right about the proper motion, Jack," she said.

Due to its high accuracy, the catalogue is still used today in proper motion studies.

A high proper motion is an indicator of closeness to the Sun.

It is considered a slowly rotating star with a relatively high proper motion.

This system has a relatively high proper motion, moving over a second of arc across the sky each year.

We're running a straight-line course between them, so their proper motion should be zero.

It lies at a distance of approximately 24 light years from us and has a relatively high proper motion.

The components of proper motion by convention are arrived at as follows.