Alan Stern
@AlanStern
Followers
41,612
Following
1,730
Media
2,713
Statuses
44,807
Planetary Scientist. Flown Commercial Research Astronaut. Pilot. Author. Speaker. Dad. Explorer. Optimist. Not in that order.
Niwot, CO
Joined July 2008
Don't wanna be here?
Send us removal request.
Explore trending content on Musk Viewer
महात्मा गांधी
• 133799 Tweets
からくりサーカス
• 94176 Tweets
WONWOO
• 86853 Tweets
ケンタッキー
• 85736 Tweets
ニンテンドーミュージアム
• 69065 Tweets
リネット
• 54007 Tweets
#swallows
• 48132 Tweets
原神コラボ
• 34475 Tweets
フォーエバーヤング
• 32494 Tweets
BTS NUNEW 1ST CONCERT EP2
• 27651 Tweets
OFF THE MASK COMING SOON
• 26527 Tweets
青木選手
• 25907 Tweets
FAYEYOKO BTS 1ST FANMEET
• 23583 Tweets
青木さん
• 18376 Tweets
ラムジェット
• 15351 Tweets
Alcaraz
• 14185 Tweets
ジャパンダートクラシック
• 13933 Tweets
Burberry Art Space
• 13527 Tweets
TORE
• 13246 Tweets
サンライズジパング
• 12429 Tweets
#ミラクル9
• 11746 Tweets
Check this out! These are REAL photos, 4K res, from the Moon, looking back at our Earth.
21st century or not, just think about this view. Everyone you know or knew or will know is on that blue planet. And we're all in this one world, together.
161
2K
7K
BREAKING…Signal has just been received at mission control, New Horizons has successfully started its flyby program of stored commands and the exploration of Ultima Thule 4 billion miles away! THIS IS IT FOLKS, FLYBY HAS BEGUN! Go New Horizons!!
#NASA
#Science
#SPACE
#ULTIMAFLYBY
101
2K
4K
Today (!!) NASA's New Horizons mission crosses the 55 AU mile marker, making it 55x as far from the Sun as Earth. That's almost twice as far as Neptune's orbit, and half a billion miles beyond even the farthest reaches of Pluto's orbit.
Go New Horizons!
55
385
2K
TALLY HO ULTIMA THULE!! An ancient relic of solar system formation, 4+ billion miles away, as dark as dirt, & shining only in the faint sunlight of the Kuiper Belt. Here it is, in a New Horizons imaging sequence. SEE IT MOVE, AGAINST THE STARS? TALLY HO! We'll be there on Monday!
41
679
2K
WE, WILL ROCK YOU! Ck this clip from
@NewHorizons2015
science team meeting when I thanked Brian May for his many contributions. Wait for my nerdy team's team's priceless response! Thanks to
@tsplanets
for this video!
#NASA
#Space
#SCIENCE
#UltimateThule
#UltimaFlyby
RTs please!
65
792
2K
THE STORY IS OUT!
I've been selected to be the first ever researcher to fly on a NASA-funded commercial suborbital space mission! See here: ...
Go NASA! Go Science!
#DreamDoComeTrue
#PersistencePays
142
213
2K
The LONG hibernation for New Horizons is ending! Yes, tonight we'll take our bird out of its almost 6-month long hibernation and into active ops to begin flyby preps for Ultima Thule at New Years day 2019! GO NEW HORIZONS!
#PlutoFlyby
47
568
2K
JUST GOT WORD FROM THE KUIPER BELT, New Horizons sent a GREEN BEACON! All’s well way out there. And this was our last beacon until long after flyby when downlink finishes in 2020. We wake the bird up from hibernation to start flyby preps next week! GO NEW HORIZONS!
33
313
1K
IT'S HAPPENING! IT'S HAPPENING! New Horizons is awake after a nearly 6 month hibernation. Flyby preparations for Ultima Thule begin shortly!
32
509
1K
104
228
1K
RIGHT NOW,
@NewHorizons2015
is as close to Ultima as the Moon is to Earth. In 7 hours we'll be at closest approach and as close as LA is to DC!
#NASA
#Space
#Science
#UltimaFlyby
#UltimaThule
38
403
1K
Today is the day we explore worlds farther than ever in history!! EVER.
#NASA
#Space
#Science
#UltimaFlyby
#ULtimaThule
34
291
967
RIGHT THIS MINUTE, NASA’s
@NewHorizons2015
spacecraft is firing its engines out in the Kuiper Belt to home in on our next flyby target!! That target is an ancient world called Ultima Thule. This engine burn is the farthest ever made by any spacecraft. ULTIMA, HERE WE COME!
25
469
980
IT’S HAPPENING!! Flyby is upon us!
@NewHorizons2015
is healthy and on course! The farthest exploration of worlds in history!
#Science
#NASA
#Space
#UltimaFlyby
#UltimaThule
30
429
915
BREAKING! Our trajectory correction burn on
@NASANewHorizons
Horizons today was spot on— Ultima is dead ahead! Go
@NewHorizons2015
39
256
916
Today
@NewHorizons2015
flies by Ultima! Our team has worked years for this moment, let's hope it all goes well!
Go New Horizons! Always keep exploring!
ps. One last well wisher video-- this one from none other than Chis Pratt!
#NASA
#SCIENCE
#SPACE
#UltimaFlyby
#UltimaThule
27
300
907
AS OF TODAY (!), New Horizons is just 1 Astronomical Unit (AU) to our next target, the KBO Ultima Thule (aka 2014 MU69)!
And we're homing in to be there and explore it on New Years Eve and New Years Day!
Mark your calendars and join us!
27
342
840
BURN SUCCESSFUL! New Horizons has reported a good trajectory maneuver today in the Kuiper Belt— MU69, here we come!
#PlutoFlyby
22
363
795
Born OTD, 1906-- Clyde Tombaugh, discoverer of Pluto and the solar systems third zone. Happy birthday Clyde!
#Amazing
22
215
774
JUST IN!
@New
Horizons2015 has emerged from a multi-month hibernation and has reported ready for work in the Kuiper Belt!
#PlutoFlyby
10
305
713
Today is the 13th
@NewHorizons2015
launch anniversary! In fact exactly now, our bird was just off its rocket on its way to Pluto and the Kuiper Belt. What a journey we have had!
26
205
715
NOTHING TO SEE HERE. JUST DONES ON FREAKIN’ PLUTO! YEAH. LIKE, WE DISCOVERED THAT!
33
178
678
Is this science, science fiction or art? ...And the winner is....Rocket Science!
29
164
691
PINCH ME! We’re less than 6 days from the flyby of
#UltimaThule
! Just half an hour ago it should have entered Encounter Mode, a state preventing anomalies from diverting off the flyby plan. Confirmation of that critical event comes this afternoon—from 4 billion miles away. 1/2
14
255
675
This JHU Applied Physics Laboratory (APL) place is hotting up with staff. Must be something about to happen. As i write these words the news is inbound from the Kuiper Belt at the speed of light, currently passing Saturn’s orbit.
#NASA
#Space
#Science
#UltimaFlyby
#UltimaThule
26
168
657
At my mom’s. She was diagnosed w COVID last week. Fortunately (at 86) she is doing well with it.
70
14
600
Precisely 18 years ago TODAY, the
@NASANewHorizons
Horizons team was selected to build and fly the first mission to explore the Pluto system and the Kuiper Belt! ….I think we did OK!
41
136
611
Check this folks! That day when your airport parking attendant recognizes you from TV and loves space exploration!
@NewHorizons2015
#NASA
#Science
#SoCool
.
35
58
603
Read this from a half century ago. A rookie astronauts reaction tonreturning from the MOON! Amazing. Read it again. Wow. Just wow.
12
179
600
#PI_Daily
Did you know?
@NewHorizons2015
is moving faster than both Pioneer 10 and Pioneer 11 and will overtake them in about 2217 (at ~640 AU) and 2118 (at ~340 AU), respectively! (1 AU=The distance from the Earth to the Sun, 93 million miles)
#NASA
#Science
#Space
25
152
572
I want to thank everyone who supported us in getting
#NASA
to continue the exploration of the Kuiper Belt by its
@NASANewHorizons
spacecraft-- You did it!
46
137
634
#PI_Daily
Today
@NewHorizons2015
marks the milestone of being 20 AU outbound from Pluto— 20x as far from Pluto as the Earth is from the Sun!
#Science
#NASA
#Space
9
90
549
IT'S HAPPENING! New Horizons has begun sending hazard search images of the space near Ultima Thule. Thru Dec 16th we will be making more & more detailed searches for hazardous moons/rings. If flying past Ultima at our planned 3,500 km range is dangerous, we'll flyby at 10,000 km.
13
220
594
Mission control: the lull. First Data coming back in 3 hours!
18
145
581
Think my team is happy about Ultima Thule? Find out at 2 pm on NASA TV-- Press conference ahead!
#NASA
#Science
#Space
#UltimaThule
#UltimaFlyby
@NASANewHorizons
@NewHorizons2015
34
143
582
AS OF TODAY, New Horizons is just 2 Astronomical Units to our next flyby target Ultima Thule--arrival on 1 Jan 2019!
22
248
565
#PI_daily
Looky what same in my mail this weekend!
Almost 1000 pages of scientific goodness in a research compendium summarizing every aspect of what we learned from the
@NASA
#NewHorizons
flyby of the Pluto system. 25 beefy chapters and several appendices! 1/2
32
101
562
SO COOL--DID YOU KNOW THIS?
While
@NewHorizons2015
flies across, it is serving as an observatory, observing dozens of Kuiper Belt Objects-- small and large-- using its LORRI telescopic imager! Look at all these objects we're studying in ways you cannot from Earth!
#SO_PROUD
!
36
235
548
Nerd moment: Go find the Moon tonight on the sky. Right next to it is Mars-- that reddish star right bu the moon. Look at Mars. That's where a NASA rover the size of a car just landed. Look at Mars tonight. think about that. No scifi. That's reality today. 🚀👍🇺🇸
15
121
544
#PI_Daily
Did you know?
@NewHorizons2015
is far beyond the distance that
@NASAVoyager
took its last photo & made its last course correction. That means every time we do either of those things we set a new distance record! Hail Voyager! Go New Horizons!
#NASA
#Space
#Science
12
112
517
Today is the 88th anniversary of the discovery of Pluto by Clyde Tombaugh. I love this mash up 1930 image of Clyde (the year he discovered Pluto) with a New Horizons image of the planet. Happy Anniversary-- Enjoy!
20
241
549
EXACTLY 6 MONTHS FROM NOW-- New Horizons flies by Ultima Thule, on 1 Jan 2019! The most distant exploration of any object in history, and likely THE most alien thing ever explored. What will we find?
#PlutoFlyby
25
219
543
We did it!! CHECK THIS!
Seeing double 👀
On April 22 & 23, New Horizons will take images of two of the nearest stars, Proxima Centauri & Wolf 359. When combined w/Earth-based images, the result will be a record-setting parallax measurement. Here's how you can participate:
38
383
1K
18
76
496
YEAH! Go Baby Go!
@NewHorizons2015
just reported in from the Kuiper Belt 4 billion (yeah— billion!) miles away: Engine burn SUCCESSFUL!! Perfect in fact! We’re right down the middle of the pike now for Ultima! Go New Horizons!
26
194
507
#PI_Daily
Did you know that the images
@NewHorizons2015
took back in September to study one of our distant Kuiper Belt Objects (KBOs) were the farthest images ever made from Earth? Yep!
#NASA
#Science
#Space
17
93
469
IIT’S OCTOBER 1ST AND WE’RE ALMOST THERE! Just 3 months from today
@NewHorizons2015
will flyby Ultima, maklng the most distant exploration of worlds in history!
9
217
502
The report is in from
@NewHorizons
in the Kuiper Belt: BURN SUCCESSFUL!! Right on the money in fact! Go New Horizons! We’re on course for Ultima Thule!
26
196
496
Ordered my second
#Tesla
Tesla S today, with delivery in just three weeks---and this one is Cop Magnet Red!
44
13
499
Final
@NewHorizons
flyby week Ultima Thule presser coming up at 2 pm Eastern-- be there with us on NASA TV!
#NASA
#Space
#UltimaThule
#UltimaFlyby
14
127
491
We're less than a million miles out now and closing fast-- 10 miles per second-- that's Boston to NY City in a minute! Arriving 33 minutes after midnight on Jan 1, US Eastern Time.
#Space
#Science
#UltimaFlyby
#NASA
#UltimaThule
@NewHorizons2015
@NASANewHorizons
22
209
483
STOP— AND THINK!
The most distant exploration of worlds every attempted will occur just 7 weeks from TODAY when New Horizons explores the mysterious Kuiper Belt Object Ultima Thule on 1 Jan 2019!
What will we find to start the new year?
16
214
464
FIVE WEEKS FROM TODAY, New Horizons flies by Ultima Thule in the Kuiper Belt, and makes the most distant exploration of worlds in history!!
Be there on line with us! Retweets please!
22
311
463
Hey! As of today, this little flyby of ours with Ultima Thule is just 5 months away--GO NEW HORIZONS!
12
142
472
In mission control awaiting word from
@NewHorizons
about how the flyby went. The data will land just before 10:30 Eastern time from the NASA’s Deep Space Network.
#NASA
#Space
#Science
#UltimaFlyby
#UltimaThule
26
159
456
Later today-- just over 100 hours to Ultima! The spacecraft has entered it's battle hardened :"Encounter Mode" and is already returning data about Ultima and its environment.
Enjoy this best wishes video to our team from rock star scientist and science author, David Grinspoon!
13
133
458
This nebula keeps reminding me of something, I just can't quite figure out what..... :-)
Thanks Leslie Ann Young for passing it along!
39
61
460
My first post-spaceflight blog about the Southwest Research Institute/ Virgin Galactic mission we just flew is out! It's called "Welcome to Space", hope you enjoy!
@SwRI
@virgingalactic
#Space
#Science
11
109
467
Last navigation meeting is over. We’re on target!
@NewHorizons2015
@NASANewHorizons
#Space
#NASA
#Science
#UltimaThule
#UltimaFlyby
17
154
466
89 years ago today, in 1930 on the anniversary of Percival Lowell's birth Lowell Observatory announced the discovery of
#Pluto
! Happy
#Pluto
and
#PercivalLowell
day to you all!
10
165
458
Tomorrow, the
@NASANewHorizons
spacecraft, which made the 1st exploration of planet Pluto, will be 25 astronomical units (AUs) from Pluto as it moves out toward interstellar space. That's ~2.5 billion miles from Pluto! Soon it'll be as far away from Pluto as the Earth is!
21
116
463
TODAY the New Horizons science team is completing our 3-day long flyby simulation JHU Applied Physics Laboratory (APL)! Check out this graphic and how close we are now to the farthest exploration of worlds in history! RTs please.
13
253
432
Just got word-- GREEN BEACON received from New Horizons! All's well in the Kuiper Belt!
#PlutoFlyby
16
86
438
Last night some of the
@NewHorizons2015
team celebrated our success at Ultima Thule and our friendship. Getting lots of texts & emails and posts from team members tday saying they miss being with one another.
#NASA
#Space
#SCIENCE
#UltimaThuleFlyby
#UltimaThule
#UkltimaThuleFlyby
10
67
436
NOW THIS ROCKS!! HERE'S A GIFT: For all you New Horizons and Ultima Thule fans, this is the flyby PRESS KIT-- JUST FOR YOU (and everyone else)! :-) Download it here: RTs please!
#NASA
#science
#Space
#UltimaThule
#UltimaFlyby
11
258
423
#PI
)_Daily Did you know that
@NewHorizons2015
is in perfect health? It’s true! After fifteen years and five billion miles of travel, none of our primary or backup spacecraft systems have failed! Hail to the women and men who designed and built this incredible spacecraft!
15
86
430
THIS JUST IN: All About Ultima: The New Horizons Flyby Target is Unlike Anything Explored in Space.
Check it out at
#Space
#NASA
#Science
#UltimaThule
#UltimaFlyby
6
216
415
#PI_Daily
SUCCESS! Our new Command and data handling (C&DH) computer flight software load is now installed and running on both our main and backup C&DH machines, way, WAY out there on
@NewHorizons2015
in the Kuiper Belt! New science capabilities ahead now!
#Science
#NASA
#Space
24
103
414
Thanks everyone for your good wishes for my 87 yr old dad who fell sick & ended up in an ICU this wk. He’s better now &!off the ventilator! A close scrape but he fought back & won! Here r 2 pics of him. One w/ me not very long ago. Another from the family way back machine. Enjoy!
40
11
421
The exploration of both Pluto and Ultima Thule by
@NewHorizons2015
earned the front page of the
@NewYorkTimes
and countless other publications, each above the fold. EXPLORATION ROCKS!!
#NASA
#SPACE
#Science
#UltimaThule
#UtimaThuleFlyby
12
114
418
#PI_Daily
Closing out the week working on our next phase of Kuiper Belt exploration, farther & farther out from the Sun. While you enjoy the day & the weekend ahead,
@NASANewHorizons
will plow 2+ million miles deeper into this ancient realm, collecting data.
#Science
#NASA
#Space
18
97
391
#PI_Daily
WOW, just WOW!! Our
@NewHorizons2015
book of Pluto system findings, The Pluto System After New Horizons, has sold out its first printing! I’m told that has NEVER HAPPENED BEFORE to any book in this 40+ year old Space Science Series! WOW!!
30
71
404
#PI_Daily
Alert! Yesterday we decided to make the next
@NewHorizons2015
Kuiper Belt Object (KBO) observations this December! These will consist of telescopic observations of 3 to 6 distant KBOs to determine shapes, surface properties & to search for moons.
#NASA
#Science
#Space
14
85
388
34
245
392
