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Brian Grefenstette
Works at California Institute of Technology
Attended Stanford University
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Brian Grefenstette

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Moon-Venus-Mars Skyline
Image Credit & Copyright: Jay Ouellet
http://apod.nasa.gov/apod/ap150228.html

Taken on February 20, five different exposures made in rapid succession were used to created this tantalizing telephoto image. In combination, they reveal a wide range of brightness visible to the eye on that frigid evening, from the urban glow of the Quebec City skyline to the triple conjunction of Moon, Venus and Mars. Shortly after sunset the young Moon shows off its bright crescent next to brilliant Venus. Fainter Mars is near the top of the frame. Though details in the Moon's sunlit crescent are washed out, features on the dark, shadowed part of the lunar disk are remarkably clear. Still lacking city lights the lunar night is illuminated solely by earthshine, light reflected from the sunlit side of planet Earth.
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So yesterday I posted about exactly how big a 12 billion solar mass black hole appears to be. But I didn’t get into the followup question of, “So why is this new black hole exciting?” Here’s why this is cool, and surprising.
So yesterday I posted about exactly how big a 12 billion solar mass black hole appears to be. But I didn’t get into the followup question of, “So why is this new black hole exciting?” Here’s why th...
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Gravitational lensing creates cosmic emoticon

I've seen many articles go up about this amazing image taken by the +Hubble Space Telescope, from +TIME to +Washington Post to this article shared out by my friend +Bethany Brookshire... which I absolutely love.

It's focused on explaining the science of this awesome image so students can better understand what's going on. To learn more about gravitational lensing and the "Einstein Ring" seen here, go read the article below. It's short and very easy to understand!

#ScienceEveryday   #Space   #Astronomy   #Hubble   #DarkMatter   #GravitationalLensing   #Hubble25  
Ancients used to ‘see’ the outline of animals and other well-known things as constellations in the night sky. Now astronomers have done much the same thing. But they’ve spotted a more distant — if totally modern — shape: a smiley face!
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…it’s a space station. Well, not really. But even this thing at a measly 300(ish) meters across has enough gravity to trap a moon (and keep it bound, even when it’s doing a flyby of MUCH bigger fish, like us). Full story with an animated gif of the moon…
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Okay, so I know that this is old news for mos people, but commuting sucks. If the world were a perfect place, then we’d all be able to ditch the car, live in close proximity to all of our friends and relatives, and have an amazing grocery store within an…
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+Brian Grefenstette I feel it man. I pushed a furniture delivery truck around Denver/Metro for 30 years.
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NASA's Van Allen Probes Discover a Surprise Circling Earth
On Aug. 31, 2012, a giant prominence on the sun erupted, sending out particles and a shock wave that traveled near Earth. This event may have been one of the causes of a third radiation belt that appeared around Earth a few days later, a phenomenon that was observed for the very first time by the newly-launched Van Allen Probes. This image of the prominence before it erupted was captured by NASA's Solar Dynamics Observatory (SDO).
 
Credit: NASA/SDO/AIA/Goddard Space Flight Center

+NASA Goddard 
+SDO | Solar Dynamics Observatory 

#NASA #Space #Solar #Sun #Eruption #Prominence #Atmosphere #Corona #Science #Flare #Radiation #VanAllen #Belt #Earth #GPS #Satellite #Observatory #SDO #GSFC
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Brian Grefenstette

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83 years young. Thanks for the inspiration over the years.
 
Live long and prosper.  RIP Leonard Nimoy.  83 years old.

via giphy.com #startrek   #spock   #nimoy  
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Question from a friend: Multiple News sources (Time Magazine, Wired, now Salon) are all claiming that this new “Monster” Black Hole which is 12+ billion light years away (thank god) is 12 Billion Times the size of our sun… But, every time I read the…
Question from a friend: Multiple News sources (Time Magazine, Wired, now Salon) are all claiming that this new "Monster" Black Hole which is 12+ billion light years away (thank god) is 12 Billion T...
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Brian Grefenstette

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Here’s a really awesome poster that someone is putting together on Etsy of all modern rocketry (1958 to now). It’s pretty amazing to see where the really modern rockets end up on here. This doesn’t include some of the aircraft-based launch vehicles (like…
Here’s a really awesome poster that someone is putting together on Etsy of all modern rocketry (1958 to now). It’s pretty amazing to see where the really modern rockets end up on here. Th...
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About a decade past tense.
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Let’s be honest, you needed something to splash up on that fancy external monitor. How’s about a live view fo the Earth from the ISS? Granted, half of the orbit it’s dark (because…nighttime). But every half hour or so it’s a very pretty thing to watch.
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I’ve been in the process of attempting to reduce the electronic clutter in my life. I talked a little bit about this before, and I’ve certainly haven’t missed the deluge of posts in my RSS feed. I decided to take the next step and try to see if I could…
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The Galactic Core in Infrared
Credit: Hubble: +NASA, +European Space Agency, ESA, & D. Q. Wang (U. Mass, Amherst); Spitzer: NASA, +NASA Jet Propulsion Laboratory, & S. Stolovy (SSC/Caltech)
http://apod.nasa.gov/apod/ap150118.html

What's happening at the center of our Milky Way Galaxy? To help find out, the orbiting Hubble and Spitzer space telescopes have combined their efforts to survey the region in unprecedented detail in infrared light. Milky Way's center because visible light is more greatly obscured by dust. The above image encompasses over 2,000 images from the Hubble Space Telescope's NICMOS taken in 2008. The image spans 300 by 115 light years with such high resolution that structures only 20 times the size of our own Solar System are discernable. Clouds of glowing gas and dark dust as well as three large star clusters are visible. Magnetic fields may be channeling plasma along the upper left near the Arches Cluster, while energetic stellar winds are carving pillars near the Quintuplet Cluster on the lower left. The massive Central Cluster of stars surrounding Sagittarius A* is visible on the lower right. Why several central, bright, massive stars appear to be unassociated with these star clusters is not yet understood.
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Have him in circles
12,807 people
Matthew Hall's profile photo
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Education
  • Stanford University
    Physics, 2000 - 2004
  • University of California, Santa Cruz
    Physics, 2004 - 2008
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Scientist
Employment
  • California Institute of Technology
    Staff Scientist, 2012 - present
    I'm a principle mission scientist on a NASA Small Explorer mission, the Nuclear Spectroscopic Telescope ARray (NuSTAR), the world's first focusing hard X-ray telescope. I "do science" (I mostly study supernova remnants like Cassiopeia A) now that NuSTAR is up in space, but I also help to develop and maintain the software down here on the ground that turns the bits and bytes coming down from NuSTAR into pictures and spectra.
  • California Institute of Technology
    Postdoc, 2008 - 2012
  • University of California, Santa Cruz
    Research Assistant, 2004 - 2008
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Where to hang out at Google+, list of hangouts at Google+
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9 Reasons to Switch from Facebook to Google+
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Can Google+ steal users from Facebook? Yep. There are good reasons to switch from Facebook to Google+, ranging from ease-of-use to respect f

Group/as - Social network user grouping made easy.
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Easily add users of the most popular social networks to groups. Help people know who to follow!

Simple Google+ Bookmarklet by AJ Batac
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Simple Google+ Bookmarklet. Drag the link below to your toolbar: Share to Google+. Works on Firefox and Google Chrome. By: AJ Batac. Quantca

The IDL Astronomy User's Library
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IDL Astronomy Library: a collection of low-level routines, mainly related to astronomy, written in the commercial language IDL

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Beachwood BBQ: HopCam
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YouTube - NASA | Massive Solar Eruption Close-up
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Create AccountSign In. Home. BrowseMoviesUpload. Hey there, this is not a commercial interruption. You're using an outdated browser, whi

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