Tagged: NASA

NASA’s Orion spacecraft re-entry – to splashdown

Video recorded during NASA’s Orion return through Earth’s atmosphere provides viewers a taste of what the vehicle endured as it returned through Earth’s atmosphere during its Dec. 5 flight test.

Way cool. Wish I was onboard.

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A year in the life of Earth’s CO2

Concentrations of greenhouse gas in the atmosphere continue to increase. On Monday, NASA released a striking video that visualizes the invisible gas as it travels around the planet over one year.

The simulation shows plumes of carbon dioxide “swirl and shift as winds disperse the greenhouse gas away from its sources,” according to NASA. The video also shows differences in carbon dioxide levels in the Northern and Southern hemispheres, as well as the change in concentrations of carbon dioxide that come with changes in season due to the growth cycle of plants and trees.

Created with an ultra-high-resolution computer model, the visualization is called “Nature Run,” simulating May 2005 to June 2007.

The Nature Run ingests real data on atmospheric conditions and the emission of greenhouse gases and both natural and man-made particulates,” NASA wrote. “The model is then is left to run on its own and simulate the natural behavior of the Earth’s atmosphere.”

Computational analysis is fundamental to growing and understanding modern science. I admit it. I love it.

What a fascinating tool.

Thanks, Mike

Auroral Corona over Norway

aurora norway
Image Credit & Copyright: Harald Albrigtsen

Higher than the highest mountain lies the realm of the aurora. Auroras rarely reach below 60 kilometers, and can range up to 1000 kilometers. Aurora light results from energetic electrons and protons striking atoms and molecules in the Earth’s atmosphere. Somewhat uncommon, an auroral corona appears as a center point for a surrounding display and may occur when an aurora develops directly overhead, or when auroral rays are pointed nearly toward the observer.

This picturesque but brief green and purple aurora exhibition occurred last month high above Kvaløya, Tromsø, Norway. The Sessøyfjorden fjord runs through the foreground, while numerous stars are visible far in the distance.

Thanks, Ursarodinia

Hinode satellite recorded X-ray footage of solar eclipse


Click to enlarge

On October 23rd, while North America was witnessing a partial eclipse of the sun, the Hinode spacecraft observed a “ring of fire” or annular eclipse from its location hundreds of miles above the North Pole. This image was taken by the X-ray Telescope – the XRT.

The Hinode spacecraft was in the right place at the right time to catch the solar eclipse. What’s more, because of its vantage point Hinode witnessed a “ring of fire” or annular eclipse…

…The XRT was developed and built by the Smithsonian Astrophysical Observatory and the Japan Aerospace Exploration Agency. Hinode’s X-ray Telescope is the highest resolution solar X-ray telescope ever flown.

The XRT collects X-rays emitted from the sun’s corona — the hot, tenuous outer layer that extends from the sun’s visible surface into the inner solar system. Gas in the solar corona reaches temperatures of millions of degrees. The energy source that heats the corona is a puzzle. The sun’s surface is only 10,000 degrees Fahrenheit, while the corona is more than 100 times hotter.

Science is so beautiful. But, then, the quest for truth always is.

Thanks, Ursarodinia

NASA’s “swarmies” robots designed to explore alien worlds


What could possibly go wrong?

A collection of autonomous robots designed to scuttle around on distant planets looking for resources and materials in much the same way that members of insect colonies do on Earth are currently being tested by NASA engineers. The robots, dubbed “swarmies,” are designed to individually survey an area, signal the others when they have found something of value, and then divide up the task of collecting the material and returning it back to base.

Currently, four of these robots have been built, each of which is fitted with a webcam, a Wi-Fi system to communicate with each other, and a GPS unit. Whilst the test terrain is a little less alien than they one day may encounter – the swarmies are being deployed in an empty car park at Kennedy Space Center in Florida – the tests are meant only to prove that the software is functioning as it should and that the robots are operating as expected.

In the tests the robots are searching for barcoded pieces of paper. However, in the future similar robots deployed on an asteroid, the moon or Mars could continuously scan the surface for water, fuel resources or other commodities vital to an away mission…

“Assuming this pays off, we know somebody’s going to take this and extend it and go beyond the four or five rovers we have here,” said Kurt Leucht, a Kennedy Space Center engineer working on the project. “So as we design this and work it through, we’re mindful about things like minimizing bandwidth. I’m sure there will be a team whether it’s us or somebody else who will take this and advance it and scale it up.”

A proper hive mentality, hive consciousness with complex interrelationships and specialization is an obvious avenue.

Of course, anyone who fears – or is comfortable with – the Borg will have interesting dreams. I’m not worried about any variety developed by government agencies. Redundancy will always be designed to guarantee the safety of the slow.

Now, when surplus gear becomes available on the cheap in some 22nd Century flea market – that’s a different story.

Thanks, Mike

NASA releases HD footage of Mars landing system

The US space agency released a spectacular video detailing the testing of an interplanetary landing system, which is designed to place more massive payloads on the surface of Mars, as it hurtled toward Earth.

In the cosmic quest to explore the surface of Mars, NASA is attempting to devise technologies that will allow it to deliver heavy payloads to the mysterious red planet. In June, NASA engineers, with the help of a massive balloon, lifted the 7,000-pound saucer-shaped test vehicle to an altitude of 190,000 feet before it was released.

The strenuous trial, which tested the so-called Low-Density Supersonic Decelerator (LDSD), was designed to create conditions similar to that of a Mars landing.

At this point, with rockets firing to keep the vehicle stabilized, video from NASA’s Jet Propulsion Laboratory showed the ‘flying saucer’ traveling at a speed of Mach 4.3 – or more than four times the speed of sound. Engineers then released an inflatable, life-preserver shaped device around the perimeter of the vehicle, officially known as a Supersonic Inflatable Aerodynamic Decelerator, or SIAD, which slowed the craft to Mach 2.

However, while the inflatable device proved tough enough to endure the rigors of such intense force, the 100-foot-wide parachute proved less successful, and nearly disintegrated as it attempted to slow the bulky, fast moving object on its descent toward Earth…

Project manager Mark Adler said that the videos will help his team as they continue to study how to improve the LDSD’s performance for a mission to Mars.

If a picture is worth a thousand words, then a video is worth about a million,” Adler said…

Gotcha!

I have to thank Ursarodinia for early prompts about this test – which didn’t have this level of video available. Thanks, Mike, for catching this new release.

Creationist says NASA’s search for alien life is unbiblical. I’d be worried if it wasn’t.

Popular creationist Ken Ham has slammed NASA’s attempts to find for extraterrestrial life, saying that God has intentionally not created life anywhere outside the Earth, and calling it a “desperate attempt to prove evolution…”

Ham, who is the CEO and founder of the Creation Museum, made his comments in response to a group of scientists who suggested that within the next twenty years, space telescopes will likely discover other habitable Earth-like planets and possible extraterrestrial life.

“It’s highly improbable in the limitless vastness of the universe that we humans stand alone,” said Charles Bolden, the current administrator of NASA and former astronaut…

The scientists are anticipating the James Webb Space Telescope’s deployment to the Earth-Sun L2 point, where it will be able to investigate the atmospheres of far-off planets circling other suns.

“Sometime in the near future, people will be able to point to a star and say, ‘that star has a planet like Earth’,” added Sara Seager, professor of planetary science and physics at MIT…

However, Ham argues that believing in extraterrestrial life is simply not Biblical.

“Secularists cannot allow earth to be special or unique – that’s a biblical idea (Isaiah 45:18). If life evolved here, it simply must have evolved elsewhere they believe,” he stated, adding that Christians who believe the Bible is the inerrant word of God “shouldn’t expect alien life to be cropping up across the universe…”

“…You see, the Bible makes it clear that Adam’s sin affected the whole universe. This means that any aliens would also be affected by Adam’s sin, but because they are not Adam’s descendants, they can’t have salvation,” he continued.

“One day, the whole universe will be judged by fire, and there will be a new heavens and earth. God’s Son stepped into history to be Jesus Christ, the ‘Godman,’ to be our relative, and to be the perfect sacrifice for sin – the Savior of mankind…”

The usual two questions apply. Stupid or ignorant? I’d say, “both…with the addition of simple-minded”. Ham has consciously decided to ignore science – and that’s stupid. As a result, he works hard at being ignorant of measurable, verifiable fact.

Rejecting reality, ignoring science – justifying that approach because you put all your attempts to understand the world on a book written by a small religious committee in the 14th Century – is absurd. Even more useless, Ham rejects additional understanding of the real world acquired in the several centuries since.

As much as he blathers about reliance on that book as the sum of all he needs, he still relies every day on the products of science and technology to sustain his life at a level higher than the Stone Age.

Thanks, Mike

V838 Light Echo — The Movie

Click to enlarge

What caused this outburst of V838 Mon? For reasons unknown, star V838 Mon suddenly became one of the brightest stars in the entire Milky Way Galaxy. Then, just a few months later, it faded.

A stellar flash like this has never been seen before — supernovas and novas expel a tremendous amount of matter out into space. Although the V838 Mon flash appeared to expel some material into space, what is seen in the above eight-frame movie, interpolated for smoothness, is actually an outwardly moving light echo of the flash. The actual time-span of the above movie is from 2002, when the flash was first recorded, to 2006.

In a light echo, light from the flash is reflected by successively more distant ellipsoids in the complex array of ambient interstellar dust that already surrounded the star. Currently, the leading model for V838’s outburst was the orbital decay and subsequent merging of two relatively normal stars. V838 Mon lies about 20,000 light years away toward the constellation of Monoceros, while the largest light echo above spans about six light years in diameter.

Thanks, Ursarodinia

NASA debuts selfie of Earth


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NASA has unveiled a global selfie, a stunning mosaic of the planet Earth seen from outer space that was stitched together from tens of thousands of self-portraits taken by people from around the world.

The Earth images were created with more than 36,000 selfies that were submitted to NASA’s Jet Propulsion Laboratory this year on Earth Day, by people from 131 nations or regions. In the mosaic, self-portraits with blue backgrounds illustrate oceans, those with white backgrounds illustrate clouds, and photos with brown backgrounds illustrate continents.

Thanks, Ursarodinia

What would a functioning warp-drive ship look like?


Image by Mark Rademaker

Artist Mark Rademaker has unveiled a set of concept images imagining what a spaceship capable of traveling to other stars in a matter of months would really look like. Although it may look like something from the next science fiction epic and is unlikely to lift off anytime soon, his IXS Enterprise design is actually based on some hard science…

The idea comes from the work published by Miguel Alcubierre in 1994. His version of a warp drive is based on the observation that, though light can only travel at a maximum speed of 186,000 miles per second spacetime itself has a theoretically unlimited speed. Indeed, many physicists believe that during the first seconds of the Big Bang, the universe expanded at some 30 billion times the speed of light.

The Alcubierre warp drive works by recreating this ancient expansion in the form of a localized bubble around a spaceship. Alcubierre reasoned that if he could form a torus of negative energy density around a spacecraft and push it in the right direction, this would compress space in front of it and expand space behind it. As a result, the ship could travel at many times the speed of light while the ship itself sits in zero gravity, meaning the crew don’t end up as a grease stain on the aft bulkhead from the acceleration.

Unfortunately, the original maths indicated that a torus the size of Jupiter would be needed, and you’d have to turn Jupiter itself into pure energy to power it. Worse, negative energy density violates a lot of physical limits itself and to create it requires forms of matter so exotic that their existence is largely hypothetical.

In recent years, Dr Harold “Sonny” White of NASA’s Johnson Space Center has given the interstellar minded some cause for optimism by showing that even if the warp drive may not be possible, it may be much less impossible than previously thought. White looked at the equations and discovered that making the torus thicker, while reducing the space available for the ship, allowed the size of the torus to be greatly decreased, down to a width of 10 meters for a ship traveling ten times the speed of light.

According to White, with such a setup, a ship could reach Alpha Centauri in a little over five months, and oscillating the bubble around the craft reduces the stiffness of spacetime, making it easier to distort. This would reduce the amount of energy required by several orders of magnitude, making it possible to design a craft that, rather than being the size of Jupiter, is smaller than the Voyager 1 probe.

RTFA for another set of reasons why we ain’t seeing this anytime soon. Or maybe even later.

But, as David Szondy says in his article, “It doesn’t hurt to dream”.