Please upgrade your browser to make full use of twiends.   chrome   firefox   ie   safari  
Create your own wall, sign in free!
Neil deGrasse Tyson
Got a bunch more Southern Hemisphere tidbits, but I think I’ll save them for even later...
So “Alpha" Centauri is the brightest star in the constellation Centaurus. And “Beta" Pictoris is the 2nd brightest in Pictor.
Apart from common names, stars are generally ID'ed in order of brightness within a constellation, using the Greek alphabet.
The Southern skies have the closest star system to the Sun - the famed “Alpha Centauri” The 3rd brightest in the night sky.
Earth is closest to the Sun during the Southern Hemisphere Summer. For the North, that of course coincides with our winter.
Many big telescope in the North have twins in the South, giving astrophysicists coherent full-sky coverage of the Universe.
Just an FYI: Earth’s South Magnetic Pole is actually in the North. That’s why the North tip of a compass needle points there.
The center of the Milky Way — a target of study for my PhD — passes directly overhead for all middle southern latitudes.
“Arctic" derives from Arktos, the Greek word for Bear. The Arctic's got em. (For now.) The Ant-Arctic doesn't.
What’s the North Pole? Curl the fingers of your right hand in the direction of rotation. Stick out your thumb. That’s North.
˙ʇdǝɔuoɔ pǝuᴉɟǝp ʎlǝsᴉɔǝɹd ʇnq 'ʎɹɐɹʇᴉqɹɐ uɐ sᴉ sʇɔǝɾqo ƃuᴉuuᴉds ɹoɟ ǝloԀ ɥʇnoS puɐ ǝloԀ ɥʇɹoN ǝɥʇ llɐɔ ǝʍ ʇɐɥM
Good Morning Australia. Resuming my tweets intended for you and everyone else down under -- south of the Equator.
Hmm. I think I’ll take a break for 6 or 7 hours — until the Aussies wake up — then continue the Southern Hemisphere hijinks.
Sundials designed for the North won't work in the Southern Hemisphere. If ported there, they would reckon time backwards.
In the North, the shadow of a sundial’s gnomon sweeps clockwise. That’s, in fact, what defined clockwise in the first place.
Some of us in the North are jealous that 100% of the world’s population of free Penguins live in the Southern Hemisphere.
Earth is not only oblate — wider at the equator than pole-to-pole, but pear shaped — slightly wider just south of the equator
Earth's centrifugal force at the Equator renders everybody and everything about 6% lighter than they’d weigh at the poles.
At a revolution speed of 1,700 km / hour, the equator is Earth’s fastest moving part. All other latitudes move more slowly.
I think it's cool that there's a country on the equator with the name "Equator". Better known in Spanish as Ecuador
Antarctica’s subglacial Lake Vostok is a body of water, trapped in ice, that hasn’t seen air in at least 15-million years.
The flag in Antarctica that ID's the South Pole has to be repositioned every year. The glacier beneath moves continuously.
The South Pole is covered with land: Antarctica. In the North, Santa’s gotta live on an (ever-shrinking) slab of floating ice
At about 2800 meters above sea level, the South Pole plateau sits at an elevation almost as high as that of Mount Olympus.
Toilet Bowls drain however they're designed to circulate water. It’s irrelevant whether you live above or below the equator.
ǝɔɐds oʇ ʇnO ˙ɹǝʇuǝɔ s’ɥʇɹɐƎ ɯoɹɟ ʎɐʍɐ suoᴉʇɔǝɹᴉp llɐ sᴉ ,,dn“ ʇᴉƃǝl ʎluo ǝɥ┴ ˙dn ɥʇɹoN ʍoɥs ɥʇɹɐƎ ɟo sdɐɯ ʇɐɥʇ ʎɹɐɹʇᴉqɹɐ s’ʇI
I don’t ever want Southern Hemispherians to feel neglected. So I now offer some tweets just for lands down under...
For survival in this world, it’s to an animal's great advantage if Humans think you're cute.
If your belief system is not founded in an objective reality, you should not be making decisions that affect other people.
How geeky are you? Wanna see @SethMacFarlane’s orbital elements? They’re here, with full citation:
Asteroid “70713 @SethMacFarlane” orbits the Sun between Mars & Jupiter. I double checked: no chance of it hitting Earth.
Join me in congratulating @SethMacFarlane for asteroid 1999UL46 being officially renamed “70713 SethMacFarlane” in his honor.
There are surely problems in the universe so advanced that our human brain cannot see them as problems in need of solution.
Personal reflections for all those who cannot forget, or who choose to remember September 11, 2001:
Would be cool if be our lives, our planet, our solar system, our universe, were part of a data simulation conducted by aliens
No science achieves maturity without measurement. And no measurement achieves maturity without the analysis & display of data
While I'm there -- I've always wondered why Peking Duck never became Beijing Duck.
When Queen Elizabeth succeeded King George in 1952, I wonder why the United Kingdom wasn't renamed the United Queendom.
All rising or setting Moons appear loomingly large. Caused by the well-known Horizon Illusion:
Tonight’s Super Moon fits easily within the field of view seen though a drinking straw. I’m just saying.
Be sure to use a Super Telephoto lens tonight. It’ll help you convince people that you actually photographed a Super Moon.
FYI: Every month, the Moon gets just as large as tonight’s Full Moon. During its New, Crescent, Half, or Gibbous phases.
We pet dogs, expecting them to lick your hand or face in delight, but if a human licked your face you’d call the police.
JUST POSTED: @StarTalkRadio's “X-Prize" [Pt 1] w/ founder @PeterDiamandis & @chucknicecomic. iTunes &
Some claim the USA is a Christian nation, compelling me to wonder which assault rifle Jesus would choose: the AR-15 or AK-47.
“How wonderful it would be if there were something out there, and they were all single & Jewish” -JoanRivers on StarTalkRadio
Not that anybody asked, but still disgruntled that the “Alphabet Song" has the same melody as “Twinkle Twinkle Little Star”.
JUST POSTED: @StarTalkRadio's “CosmicQueries: General Astrophysics 101” w/ @LeighannLord. On @iTunes &
JUST POSTED: @Startalk Radio’s “A Conversation with @sethmeyers.” On @iTunes &