• Worth a 1000 words so you owe me.

Best space photos of 2011: on.natgeo.com/rENnSk

— National Geographic (@NatGeo) December 30, 2011

• Maybe @cpsxnews 's MB wants to try this but not me!

6 Guys in a Capsule: 520 Days on a Simulated Mars Mission. Are we there yet? bit.ly/pn1WEX

— Wired (@wired) November 15, 2011

• Other cool planetary stuff:

Planetary science students at UCLA simulate Jupiter's atmosphere in SPINLab tests (via @volcanojw) fb.me/1mOAJo8n6

— Jason Major (@JPMajor) December 21, 2011

Mercury's magnetic field -- nipped in the bud tw.physorg.com/243840360

— PhysOrg Science News (@physorg_com) December 23, 2011

!Prof Wiegert!: what do you think about this?

Earth Must Have Another Moon, Say Astronomers bit.ly/rMTgTE

— SpaceMeme (@spacememe) December 21, 2011

• #ShamelessSelfPromotion

Lack of correlation is interesting RT @globeandmail How Canada's fastest rising Google searches compare to world's tgam.ca/DMaJ #fb

— Bob Sica (@bobsica) December 27, 2011

#xkcd: Mnemonics. Finally a mnemonic that works for #Taxonomy. #KernelPanics #WhosKatyPerry? post.ly/4P769

— UWO Lidar Group (@purplecrowlidar) December 21, 2011

Michael McIntyre's Fellow talk at #agu11. WOW. @theagu I demand Michael get his own session next year. I'm #Gyroscop... post.ly/4BmmO

— UWO Lidar Group (@purplecrowlidar) December 7, 2011

• Western P&A Honor Roll: Phin

What a heckuva moving day @uwophysastro. Thanks for everything Phin you are amazing! Let's do it again Monday (the lab) #westernu #fb

— UWO Lidar Group (@purplecrowlidar) December 16, 2011

• Snap!

Today's Winter Solstice is something scientists measure and and predict, so now you can decide whether to "believe in it."

— pourmecoffee (@pourmecoffee) December 22, 2011

Top tweet of the month (true dat):

The best engineering flow chart ever: twitter.com/neiltyson/stat…

— Neil deGrasse Tyson (@neiltyson) December 21, 2011