Discover and read the best of Twitter Threads about #astronomy

Most recents (7)

“Earthrise: A Video Reconstruction” is #NASA #astronomy picture of the day by @apod/@USRAedu apod.nasa.gov/apod/ap181223.… Apollo 8’s iconic photo “Earthrise” was taken 50 years ago; 4K HD animation shows astronauts’ view using NASA LRO data of lunar surface
“Earthrise in 4K” is a 50th anniversary commemoration of the 1968 #Earthrise image during Apollo 8, and description how the rendering was made with NASA LRO imagery/data taken since 2009, by @NASA/@NASAGoddard/@USRAedu #astronomy #Apollo50 #Apollo8 #Moon
#Apollo8 was historic for 1st time humans left Earth and orbited the Moon. Apollo was intended as Cold War competition with Soviets. Starting with #Earthrise photo and many other observations, we found we had much to learn about Earth there. #astronomy #space #history
Read 7 tweets
Today's thread

A look at "Maya" in the night sky.

How Saptarishi/ big Dipper constellation is a divine illusion.

The whole world is indeed Maya

#astronomy #maya #CBG_Thread
Saptarishi or Big Dipper is the most commonly recognizable constellation in the night sky. Woven into mythology and folk lores across the world, it must have guided forlorn sailors and travellers alike. But what if I told you that the appearance of constellation is a lie? 2/n
Made up 7 stars, the nearest star of Saptarishi is only 63 light years away while the farthest one is 210 light years away...... 1 light year is almost 9000 billion kms.

You can see that they are anything but a closely placed group of stars. 3/n
Read 8 tweets
Got a seat right in the front at #CSPC2018 @sciencepolicy for the panel on #NextGenCanScience (science and the next generation) feat enablers of trainees getting involved in #scipol @ChiefSciCan @McGill_VPRI @katemoran Stacey Robinson and @DanWicklum
#CSPC2018 @ChiefSciCan mentions #Budget2018 reinvestments of 2.8B$ to create more collaborative infrastructure in govt labs and beyond. This is a once in a lifetime opportunity to get things right and elevate Canada in science leadership 🙌
📣 All major equipment in federal labs will be part of a registry and be accessible to everyone ➡️ democratizing the infrastructure of #cdnsci - @ChiefSciCan #CSPC2018 @sciencepolicy
Read 37 tweets
For the record, I know nothing about astrology.
I love Astronomy!!!
I was even on the core team during the repair the Hubble Telescope while the Cosmic Origins Spectrograph (COS) which was installed during Servicing Mission 4 (STS-125) in May 2009.
Astronomy (from Greek: ἀστρονομία) is a natural science that studies celestial objects & phenomena. It applies mathematics, physics, & chemistry, in an effort to explain the origin of those objects & phenomena & their evolution. I love looking at the stars.
Objects of interest include planets, moons, stars, galaxies, & comets; the phenomena include supernova explosions, gamma ray bursts, & cosmic microwave background radiation. More generally, all phenomena that originate outside Earth's atmosphere are w/in the purview of astronomy.
Read 49 tweets
THREAD - How about a bunch of blog posts on #Space and #Astronomy? Yes, I have more than you can imagine - especially since these are really just #physics topics. Hold on - because this is going to be a bit large.
2/ Here is an answer to my fav astronomy question EVER - "What would the phases of the moon look like if the moon was a cube?" wired.com/2015/09/moon-c…
3/ The great thing about the cube moon question is that it really tests if students understand phases of the moon rather than just recalling factual stuff. Here is my python model of a cube and spherical moon
Read 70 tweets
Expanding the #HertzsprungRussell diagram courtesy of @xkcdComic

#Physics #Astronomy #Cosmology

Step 1: Take an HR Diagram
Expanding the #HertzsprungRussell diagram courtesy of @xkcdComic

#Physics #Astronomy #Cosmology

Step 2: Add a Scale
Expanding the #HertzsprungRussell diagram courtesy of @xkcdComic

#Physics #Astronomy #Cosmology

Step 3: Expand the Diagram
Read 14 tweets
Today's thread

Measurement of time.
How current calendars can't match ancient Hindu timekeeping.

Why a day isn't always 24 hours long

Why a year doesn't have 365.25 days

#science #astronomy #Time
1/n
How long does a day last everyday? 24 hours? Wrong.

We define day as the time taken by Earth to complete one rotation around its axis.
But with respect to what is the measurement made? 2/n
Since Earth is also revolving around Sun while it is rotating, it needs to rotate a little extra when rotation is measured w.r.t. sun (solar day) than a distant star (sidereal day)
3/n
Read 10 tweets

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