Proper Motion and Parallax

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The stars move in many ways. They are not fixed in the sky but changes slowly over the centuries.
Proper Motion: en.wikipedia.o...
Radial Velocity: en.wikipedia.o...
Space Velocity: en.wikipedia.o...
Parallax: en.wikipedia.o...
Barnard's Star: en.wikipedia.o...
The Hyades: en.wikipedia.o...)
Dark Matter from Galaxy Rotation Curves: en.wikipedia.o...
Jack Schmidling's view of Barnard's Star: schmidling.com/...
Radar Mapping of Venus: mentallandscape...

[@noelstarchild]

The Gaia telescope results blew me away, a galaxy in motion and information that tracks backwards and forwards in time.
Thank you Mr Kendall, informative as always.

[@JasonKendallAstronomer]

I know, right?

[@UncleArthur44]

@jasonkendall
Thanks for many very informative videos.
I have to admit though that I don’t understand the logic behind astronomical parallax.
That is not just from you, but from every explanation I have ever come across.
eg: you take a measurement (a) and six months later you take measurement (b) and count the distance between the two as 2 au. You then half that to presumably give a baseline of 1 au and a right angle from the sun.
What about the fact that the sun and earth are also moving through space at right angles to this assumed baseline at about 220,000m/s?
Wouldn’t that put the distance travelled by the earth between (a) and (b) closer to 22 au?
Where am I going wrong?

[@Radar23]

Yay

[@oak2movin354]

seen you in the netflix series. interesting.

[@potato-ld1uj]

Do you remember what it was called?

[@Radar23]

I'm completely lost watching your videos.. 😂