Sirius
The dog star, being always low in the British sky seems to twinkle because of the starlight travelling through the atmosphere and getting churned up.

No star can quickly change colour, which is a direct result of surface temperature. All stars change colour over long time spans as they develop and eventually die.
( Bartleby A dead man on vacation, Fri 5 Feb 2010, 9:06, 1 reply, 16 years ago)

Yes it's twinkling
and it's kind of going redblueyellowbluewhite
( Roota zweeeeeoooooowm, Fri 5 Feb 2010, 9:07, Reply)

If it was higher up
It would be white and not twinkle
( Bartleby A dead man on vacation, Fri 5 Feb 2010, 9:13, Reply)

Got it
It turned into something else once though.
Flew round our house.
I was 10.
( Roota zweeeeeoooooowm, Fri 5 Feb 2010, 9:19, Reply)

10 on mushrooms
( Noeli overtheshoulderboulderholderthingstraplatchboobs, Fri 5 Feb 2010, 9:26, Reply)

'koff right
It did.
I'm getting neck strain here. Can we move if you're gonna insult me more?
( Roota zweeeeeoooooowm, Fri 5 Feb 2010, 9:28, Reply)