today i learned – sat 3rd feb 2018

as long term blog readers will probably know (if i have any of those πŸ˜‚), i’m a bit obsessed with space πŸš€

as such, my beautiful girlfriend decided to teach me a fun space fact πŸ™ŒπŸ» let’s do this! 😏

#tdil what ‘redshift’ and ‘blueshift’ are πŸ€” (prepare to go full gcse physics peeps 😏)

whilst those two terms probably mean pretty much nothing right now, they actually refer to some pretty cool space stuff πŸ›Έ

the two terms basically relate to whether objects in space (planets/stars/that kind of good stuff) are moving towards us or away from us πŸ‘πŸ». you see, it all comes down to the light’s wavelength and how it changes as objects get closer or further away πŸ€”

as you’ll have seen from a rainbow, light comes in a spectrum of colours – red and yellow and pink and greeeeeen, purple and orange and blueeeeeee (sing that … it’s actually relevant).

anyway, this spectrum comes into to play as the space objects fly about – you see, as things get further away, the light wavelengths get longer and the colour of the light is shifted towards the red end of the scale.

the opposite happens as things get closer – the light’s wavelength gets shorter and the colour shifted towards the blue end of scale πŸ”΄πŸ”΅

how can you observe/use this knowledge? well, if you ever use a telescope or take a gander into space, you’ll now be able to tell whether things are getter closer or not … thanks to this post, you’ll now be the first to see an asteroid coming towards us from hella far away 😏

possibly more useful than asteroid avoidance … scientists are using blueshift and redshift to figure out more about the whole universe expansion thing 😁

fun times, hey! 😏 love a good space fact πŸ™ŒπŸ» hopefully it has been useful in some way … we’ve had loads of clear nights recently, so go watch some stars peeps!

byeeeee 😌 #tdil


i really enjoyed today’s fact 😊 fancy learning some more good stuff? well, you should really head ->here<-

(picture time!! image one is ->here<-, image two is ->here<-, image three is ->here<- and the header is ->here<-)

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