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SETI Institute
yesterday at 21:31. Facebook
Latest #SETITalks: The Late Veneer and Earth's habitability - Norm Sleep, Stanford University

Asteroid impacts were a hazard to any life on the Hadean Earth. A traditional approach to geochemical models of the asteroid impactors uses the concentration of highly siderophile elements including the Pt-group in the silicate Earth. These elements occur in roughly chondritic relative ratios, but...
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The Late Veneer and Earth's habitability - Norm Sleep(SETI Talks 2017)

Asteroid impacts were a hazard to any life on the Hadean Earth. A traditional approach to geochemical models of the asteroid impactors uses the concentration...

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SETI Institute
yesterday at 18:02. Facebook
Big Picture Science Radio Show - Geology is Destiny

Geology is big history. If the Ice Age had been a bit warmer, the U.S. might have only 13 states. But humanity has introduced its own geologic era, the Anthropocene. Will our descendants dig up our plastic refuse to study it the way we study dinosaur bones? Also, a new study of the dodo bird shows that its extinction was due to habitat...
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Big Picture Science Radio show - Geology is Destiny | SETI Institute

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SETI Institute
yesterday at 12:18. Facebook
APOD: 2017 January 15 - The Matter of the Bullet Cluster

Image Credit: X-ray: NASA/CXC/CfA/ M. Markevitch et al.;
Lensing Map: NASA/STScI; ESO WFI; Magellan/U.Arizona/ D.Clowe et al.
Optical: NASA/STScI; Magellan/U.Arizona/D.Clowe et al.

What's the matter with the Bullet Cluster? This massive cluster of galaxies (1E 0657-558) creates gravitational lens distortions of background galaxies in a...
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SETI Institute
01/13/2017 at 22:54. Facebook
SETI Institute
01/13/2017 at 21:31. Facebook
Titan Touchdown

On Jan. 14, 2005, ESA's Huygens probe made its descent to the surface of Saturn's hazy moon, Titan. Carried to Saturn by NASA's Cassini spacecraft, Huygens made the most distant landing ever on another world, and the only landing on a body in the outer solar system. This video uses actual images taken by the probe during its two-and-a-half hour fall under its...
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Titan Touchdown

On Jan. 14, 2005, ESA's Huygens probe made its descent to the surface of Saturn's hazy moon, Titan. Carried to Saturn by NASA's Cassini spacecraft, Huygens m...

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SETI Institute
01/13/2017 at 18:03. Facebook
Charon Is Pluto's First Line of Defense Against Solar Wind Onslaught

Researchers from Georgia Institute of Technology have shown that when Charon orbits between Pluto and the sun, its presence can modify the dwarf planet's bow shock — a standing shock wave that appears "upstream" of Pluto as the solar wind particles encounter Pluto's thin atmosphere, like the wave that roils in front of a...
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Charon Is Pluto's First Line of Defense Against Solar Wind Onslaught

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SETI Institute
01/13/2017 at 15:06. Facebook
Simulations suggest Planet Nine may have been a rogue

Planet Nine was first predicted to exist just two years ago, when a team of investigators noticed what appeared to be an unknown gravitational influence in the outer solar system. Since then, other researchers have also noticed gravitational influences consistent with a planet on the order of 10 times the size of Earth. Prior research has...
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Simulations suggest Planet Nine may have been a rogue

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SETI Institute
01/13/2017 at 12:17. Facebook
A Piece of Mars: Tortoise and hare | Lori Fenton's Blog

There’s a lot of evidence for both fast and slow movement in this 480×270 m (0.3×0.17 mi) scene.

The tortoise: The rippled surface at the top is high ground: the top of a dune. Wind pushes the ripples toward a steep sunlit slope, creating long thin, dark avalanches that slowly inch the slipface forward. At the bottom of the slope, which...
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SETI Institute
01/12/2017 at 21:35. Facebook
SETI Institute
01/12/2017 at 19:53. Facebook
In a few minutes, our very own Jon Richards will participate in today's Deep Astronomy hangout to talk about Tabby's Star observations.

Comet Swarms or an Alien Megastructures? The Strange Variations

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SETI Institute
01/12/2017 at 18:03. Facebook
What's causing those mysterious 'bursts' from deep space?

Tracking down the source of the bursts was hard. But thanks to a lucky break, it has now been solved in one case. A source with the lilting name FRB 121102, discovered at Arecibo, was burping over and over. Unlike others, it was making more than just a one-night stand, and repeatedly sent radio waves into space. This is not the...
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What's causing those mysterious 'bursts' from deep space?

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SETI Institute
01/12/2017 at 15:06. Facebook
Neptune as a Mirror for the Sun

How would the Kepler mission see a star like the Sun? We now know the answer to this question due to a creative approach: a new study has used the Kepler K2 mission to detect signals from the Sun reflected off of the surface of Neptune.

We do this by first understanding our Sun’s oscillations especially well (made easier by the fact that it’s nearby!). Then we...
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Neptune as a Mirror for the Sun

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SETI Institute
01/12/2017 at 12:18. Facebook
Mimas' Mountain

Shadows cast across Mimas' defining feature, Herschel Crater, provide an indication of the size of the crater's towering walls and central peak.

Named after the icy moon's discoverer, astronomer William Herschel, the crater stretches 86 miles (139 kilometers) wide -- almost one-third of the diameter of Mimas (246 miles or 396 kilometers) itself.

Large impact craters often...
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SETI Institute
01/11/2017 at 21:31. Facebook
Humans Really Are Made of Stardust, and a New Study Proves It

The crucial elements for life on Earth, often called the building blocks of life, can be abbreviated as CHNOPS: carbon, hydrogen, nitrogen, oxygen, phosphorus and sulfur. For the first time, astronomers have cataloged the abundance of these elements in a huge sample of stars.

The astronomers evaluated each element's abundance...
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Humans Really Are Made of Stardust, and a New Study Proves It

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SETI Institute
01/11/2017 at 18:03. Facebook
Congratulations to Rebekah Dawson, 2017 Annie Jump Cannon Award recipient and former Institute REU student!

The 2017 Annie Jump Cannon Award for outstanding research and promise for the future by a postdoctoral woman scientist goes to Rebekah Dawson (Pennsylvania State University) for her work modeling the dynamical interactions of exoplanets in multiplanet systems. Her studies help explain...
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SETI Institute
01/11/2017 at 15:06. Facebook
Asteroid sleuths go back to the future

Careful sleuthing through decade-old images has enabled ESA’s asteroid team to decide that a newly discovered space rock poses little threat of hitting Earth any time soon.

Spotting a previously unknown asteroid for the first time always raises the big question: is there a risk it will impact Earth?

Yet, upon discovery, analysts often have very little...
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Asteroid sleuths go back to the future

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SETI Institute
01/11/2017 at 12:17. Facebook
A Piece of Mars: Steno’s principles, or “how to make sense of pretty landscapes”

Nicholas Steno was a 19th century geologist, who came up with some principles that are still used today to guide interpretation of exposed sedimentary rocks. The principles seem a bit obvious, but then some of the most profound principles can be like that.

What I like most about this image has to do with yet...
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Legendary radio telescope hangs in the balance

The US National Science Foundation (NSF), which owns the observatory, wants to offload the facility to free up money for newer ones. In the coming weeks, it will ask for ideas about how Arecibo might be managed if the NSF reduces its current US$8.2-million annual contribution. By May, the agency plans to release a final environmental-impact...
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Legendary radio telescope hangs in the balance

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SETI Institute
01/10/2017 at 22:55. Facebook
‘Alien megastructure’ signal may be due to star eating a planet

If Tabby’s star devoured a planet in the past, the planet’s energy would have made the star temporarily brighten, then gradually dim to its original state. The bigger the planet was, the longer the star would take to dim. Depending on the size of the planet, this event could have happened anywhere between 200 and 10,000 years...
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‘Alien megastructure’ signal may be due to star eating a planet

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SETI Institute
01/10/2017 at 15:06. Facebook
The discovery in 2016 of a planet, Proxima b, around Proxima Centauri, the third and faintest star of the Alpha Centauri system, adds even further impetus to this search.

Knowing where the nearest exoplanets are is of paramount interest for Breakthrough Starshot, the research and engineering programme launched in April 2016, which aims to demonstrate proof of concept for ultra-fast...
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VLT to Search for Planets in Alpha Centauri System - ESO Signs Agreement with Breakthrough Initiatives

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