I Said I Was Sorry.

Earth and Moon between the Rings of Saturn [1024x1024]

hate doesn’t just happen. war doesn’t just happen. And we are definitely not “right” enough to kill or bring pain to anyone… // Hina Syeda

Academics

In popular culture: wear tweed/plaid/some sort of bland pattern; often in suits; pristine appearance, maybe with wild hair or ink stains; drink tea and coffee; constantly reading books for work and pleasure; erudite conversationalists; love what they do

Me: mostly wear sweatshirts and leggings with a messy bun because if no one needs to see me then screw getting into nice clothes; my blood is tea at this point; ink stains were surpassed long ago; spend a lot of time crying over theory texts and papers; eat a lot of ice cream and watch a lot of Netflix to avoid work; love what I do

"When Shelley's corpse washed ashore, a friend identified it by a copy of Keats's 1820 volume in the coat pocket, which he knew Shelley had taken with him. Then, after cremation in which Shelley's heart, hardened by calcium, did not burn, this same friend snatched it from the embers and presented it to Mary Shelley, who kept it thereafter in her desk, wrapped in a copy of 'Adonais."

Here’s your morbid literary fact of the day.

X-ray binary (black hole devouring a star)

X-ray binaries are a class of binary stars that are luminous in X-rays. The X-rays are produced by matter falling from one component, called the donor (usually a relatively normal star), to the other component, called the accretor, which is very compact: a neutron star or black hole. The infalling matter releases gravitational potential energy, up to several tenths of its rest mass, as X-rays. (Hydrogen fusion releases only about 0.7 percent of rest mass.) The lifetime and the mass-transfer rate in an X-ray binary depends on the evolutionary status of the donor star, the mass ratio between the stellar components, and their orbital separation.

An estimated 1041 positrons escape per second from a typical low-mass X-ray binary.

source

animation

Two Steps Forward in the Search for Life on Mars

We haven’t found aliens but we are a little further along in our search for life on Mars thanks to two recent discoveries from our Curiosity Rover.

We detected organic molecules at the harsh surface of Mars! And what’s important about this is we now have a lot more certainty that there’s organic molecules preserved at the surface of Mars. We didn’t know that before.

One of the discoveries is we found organic molecules just beneath the surface of Mars in 3 billion-year-old sedimentary rocks.

Second, we’ve found seasonal variations in methane levels in the atmosphere over 3 Mars years (nearly 6 Earth years). These two discoveries increase the chances that the record of habitability and potential life has been preserved on the Red Planet despite extremely harsh conditions on the surface.

Both discoveries were made by our chem lab that rides aboard the Curiosity rover on Mars.

Here’s an image from when we installed the SAM lab on the rover. SAM stands for “Sample Analysis at Mars” and SAM did two things on Mars for this discovery.

One - it tested Martian rocks. After the arm selects a sample of pulverized rock, it heats up that sample and sends that gas into the chamber, where the electron stream breaks up the chemicals so they can be analyzed.

What SAM found are fragments of large organic molecules preserved in ancient rocks which we think come from the bottom of an ancient Martian lake. These organic molecules are made up of carbon and hydrogen, and can include other elements like nitrogen and oxygen. That’s a possible indicator of ancient life…although non-biological processes can make organic molecules, too.

The other action SAM did was ‘sniff’ the air.

When it did that, it detected methane in the air. And for the first time, we saw a repeatable pattern of methane in the Martian atmosphere. The methane peaked in the warm, summer months, and then dropped in the cooler, winter months.

On Earth, 90 percent of methane is produced by biology, so we have to consider the possibility that Martian methane could be produced by life under the surface. But it also could be produced by non-biological sources. Right now, we don’t know, so we need to keep studying the Mars!

One of our upcoming Martian missions is the InSight lander. InSight, short for Interior Exploration using Seismic Investigations, Geodesy and Heat Transport, is a Mars lander designed to give the Red Planet its first thorough checkup since it formed 4.5 billion years ago. It is the first outer space robotic explorer to study in-depth the “inner space” of Mars: its crust, mantle, and core.

Finding methane in the atmosphere and ancient carbon preserved on the surface gives scientists confidence that our Mars 2020 rover and ESA’s (European Space Agency’s) ExoMars rover will find even more organics, both on the surface and in the shallow subsurface.

Read the full release on today’s announcement HERE. 

Make sure to follow us on Tumblr for your regular dose of space: http://nasa.tumblr.com.  

it is absolutely my kind of thing. so much work, such intricate pieces! I would’ve loved to be on the team that put this together.

Creepy or adorable? Researchers at Harvard University have demonstrated the first autonomous, untethered, entirely soft robot: the octobot.

Instead of being controlled by electronics, the robot’s logic board is powered by chemical reactions and fluid passing along tiny channels. Scientist have struggled to create completely soft robots because rigid components like circuit boards, power sources and electronic controls are difficult to replace.  

Learn more about the octobot and soft robotics here and see the full study published in Nature here.

Videos Credit: Harvard SEAS/Image Credit Lori Sanders

Research is formalized curiosity. It is poking and prying with a purpose.

Zora Neale Hurston (via berghahnbooks)