Stellar Parallax - IB Physics

Stellar parallax is a method astronomers use for calculating the distance to nearby stars using their observations of how stars move in the night sky as the Earth orbits the sun. This lecture explains how we get the stellar parallax equation, how to use the equation to solve parallax problems, and how the unit of distance Parsec is related to the idea of stellar parallax.

[@subramaniamarumugam2433]

This is the best video so far. Very clearly explained with diagrams and exercise how it is actually calculated.
You nailed it mate.👍🏾
Thank you and best regards.

[@captdrkashifaehsan779]

very clear and thorough explanation of a difficult concept

[@mashokvaratskhelia6789]

amazing really I have watched over 20 videos and its the first one I really understood

[@dreemurr64]

Where did you even find 20 videos of the same topic

[@saintsergio5592]

Hey your videos are awesome, it would be great if you covered the Imaging option too

[@charlessnachez4248]

All videos use this parallax angle but no one explained how to mesure it

[@Kielyn123]

Excellent and explained in a simplified, easily understood manner

[@samjordan9439]

This is a really good!

[@kouverbingham5997]

At 4:33 you said "this is the january angle of sight, and this is the july angle of sight" seeming to imply these values are just measured. How are these values typically measured? I'm imagining the deviation of the star being measured on a flat photograph. How does one get those two angle from a flat photograph deviation distance?

[@flario13]

One needs two photographs, one in July and one in January, and then to measure the angles (from the variation of latitude/longitude) between the star (close to the Sun so moving in the sky) and another very distant star that doesn't move. It is not possible from one photograph

[@kouverbingham5997]

@@flario13 ok so how do you get a longitude and latitude from two photographs??

[@kellyjin2469]

Hi Andy! Just wondering, is this playlist complete for option D? Does it include everything in the syllabus? Thank you!! :)

[@AndyMasley]

Sadly no! There's a lot missing unfortunately

[@kellyjin2469]

@@AndyMasley Oh no :( Do you know of any good resources for this option?

[@kellyjin2469]

@@AndyMasley Which topics are missing??

[@shamelsinha1626]

Hey! Do you mind doing an Engineering Option too? It would be of tremendous help!

[@chadrunyon6823]

Nice job.

[@jarrodly7751]

thanks bro

[@iitncompany]

if its work then explain one simple example at home, take one object at one place inside your home then try to find the theta , may you find the theta ?

[@flario13]

You can find the theta if you take a 360° photo of your room and calibrate it with a grid that shows the spherical coordinates (latitude/longitude)

[@iitncompany]

if the star is not parallel to sun then ?

[@flario13]

Then the parallax shape is not a circle but an ellipse, which does not change the result

[@iitncompany]

Also at millions kilometers everything will be looks like parallel to sun so this is wrong information.

[@flario13]

You are wrong information. As he said parallax can be measured by instruments up to a certain distance. The second data release of GAIA included the parallaxes of 1.3 billion stars

[@captdrkashifaehsan779]

very clear and thorough explanation of a difficult concept