The Hipparcos data give us:?

May 2021 2 86 Report

The Hipparcos data give us:?

A. information on only the 6,000 brightest stars.

B. an accurate distance to the Moon.

C. parallaxes as small as 0.005".

D. distances to about 100 billion stars, practically everything in the Milky Way Galaxy.

Its a real shame that none of the online search engines are working tonight, it would only take 3 seconds to find the information.

Wait, let me go check for you...hmmm, they all seem to be working fine now.

C. Hipparcos was designed to get parallax data down to around .002 arc second (two milliarc seconds), and did so for around 100,000 stars.