Pi Guides The Way

I was fortunate enough to see the full-size model of this craft at @nasagoddard and was given a description & full explanation of the ambitious mission. Thanks, NASA Social!

Mission Possible: Redirecting an Asteroid

As part of our Asteroid Redirect Mission (ARM), we plan to send a robotic spacecraft to an asteroid tens of millions of miles away from Earth, capture a multi-ton boulder and bring it to an orbit near the moon for future crew exploration.

This mission to visit a large near-Earth asteroid is part of our plan to advance the new technologies and spaceflight experience needed for a human mission to the Martian system in the 2030s.

How exactly will it work?

The robotic spacecraft, powered by the most advanced solar electric propulsion system, will travel for about 18 months to the target asteroid.

After the spacecraft arrives and the multi-ton boulder is collected from the surface, the spacecraft will hover near the asteroid to create a gravitational attraction that will slightly change the asteroid’s trajectory.

After the deflection is verified, the robotic vehicle will deliver the boulder into a stable orbit near the moon. During the transit, the boulder will be further imaged and studied by the spacecraft.

Astronauts aboard the Orion spacecraft will launch on the Space Launch System rocket to explore the returned boulder.

Orion will dock with the robotic vehicle that still has the boulder in its grasp. 

While docked, two crew members on spacewalks will explore the boulder and collect samples to bring back to Earth for further study.

The astronauts and collected samples will return to Earth in the Orion spacecraft.

How will ARM help us send humans to Mars in the 2030s?

This mission will demonstrate future Mars-level exploration missions closer to home and will fly a mission with technologies and real life operational constraints that we’ll encounter on the way to the Red Planet. A few of the capabilities it will help us test include: 

Solar Electric Propulsion – Using advanced Solar Electric Propulsion (SEP) technologies is an important part of future missions to send larger payloads into deep space and to the Mars system. Unlike chemical propulsion, which uses combustion and a nozzle to generate thrust, SEP uses electricity from solar arrays to create electromagnetic fields to accelerate and expel charged atoms (ions) to create a very low thrust with a very efficient use of propellant.

Trajectory and Navigation – When we move the massive asteroid boulder using low-thrust propulsion and leveraging the gravity fields of Earth and the moon, we’ll validate critical technologies for the future Mars missions. 

Advances in Spacesuits – Spacesuits designed to operate in deep space and for the Mars surface will require upgrades to the portable life support system (PLSS). We are working on advanced PLSS that will protect astronauts on Mars or in deep space by improving carbon dioxide removal, humidity control and oxygen regulation. We are also improving mobility by evaluating advances in gloves to improve thermal capacity and dexterity. 

Sample Collection and Containment Techniques – This experience will help us prepare to return samples from Mars through the development of new techniques for safe sample collection and containment. These techniques will ensure that humans do not contaminate the samples with microbes from Earth, while protecting our planet from any potential hazards in the samples that are returned. 

Rendezvous and Docking Capabilities – Future human missions to Mars will require new capabilities to rendezvous and dock spacecraft in deep space. We will advance the current system we’ve developed with the international partners aboard the International Space Station. 

Moving from spaceflight a couple hundred miles off Earth to the proving ground environment (40,000 miles beyond the moon) will allow us to start accumulating experience farther than humans have ever traveled in space.

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

Homeopathy Death Merchant ‘True Cancer Remedies’ This is precisely the type of thing we've been trying to shine a light on. This is a woo-peddler that actively encourages people to avoid medical care in favor of homeopathic 'self help'.

This unprocessed image shows features in Saturn’s atmosphere from closer than ever before. The view was captured by our Cassini spacecraft during its first Grand Finale dive between the planet and its rings on April 26, 2017.

As Cassini dove through the gap, it came within about 1,900 miles (3,000 kilometers) of Saturn’s cloud tops (where the air pressure is 1 bar – comparable to the atmospheric pressure of Earth at sea level) and within about 200 miles (300 kilometers) of the innermost visible edge of the rings.

See all the unprocessed images from Cassini: https://saturn.jpl.nasa.gov/galleries/raw-images/ 

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

In this video, we examine a rant by youtuber Jeranism against Stephen Hawking. Jeranism spends no time refuting any of Hawking's theories, but spends an inordinate amount of time criticizing Mr. Hawking for having and displaying symptoms of advanced ALS. At one point he even laughs at the fact that Mr. Hawking cannot speak.

Buster, sole Atheist among #Pugs , demolishes Ken Ham!

Ever have to talk to an #evolution denier? Seems that this is usually how it goes.

http://www.youtube.com/watch?feature=player_embedded&v=hgBHWkjVks4

Bill Nye says "Change the world!" at Reason Rally On June 4th, 2016, Bill Nye, clad in his customary suit and bow tie, took center stage at Reason Rally in Washington DC.

Ken Ham, the Anti-Science Sham and his Ark.

Penn Jillette and Carolina Peña at Reason Rally

Penn Jillette and Carolina Peña at #ReasonRally

Saturday, June 4th, Penn Jillette introduced Carolina Peña, a former contestant on ‘Equador’s Got Talent’ on the main stage at Reason Rally in Washington DC. Carolina was berated by three of the four judges, not for her singing abilities or overall talent, but for lacking a belief in any gods. She was told that, basically, without God, she could have no talent. The fourth judge quite rightly…

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#NASASocial #ToBennuAndBack

Asteroid Terms: Explained

There are interesting asteroid characters in our solar system, including an asteroid that has its own moon and even one that is shaped like a dog bone! Our OSIRIS-REx mission launches at 7:05 p.m. EDT today and will travel to asteroid Bennu.

Scientists chose Bennu as the target of the OSIRIS-REx mission because of its composition, size and proximity to Earth. Bennu is a rare B-type asteroid (primitive and carbon-rich), which is expected to have organic compounds and water-bearing minerals like clays.

Our OSIRIS-REx mission will travel to Bennu and bring a small sample back to Earth for study.

When talking about asteroids, there are some terms scientists use that might not be in your typical vocabulary…but we’ll help with that!

Here are a few terms you should know:

Orbital Eccentricity: This number describes the shape of an asteroid’s orbit by how elliptical it is. For asteroids in orbit around the sun, eccentricity is a number between 0 and 1, with 0 being a perfectly circular orbit and 0.99 being a highly elliptical orbit.

Inclination: The angle, in degrees, of how tilted an asteroid’s orbit is compared to another plane of reference, usually the plane of the Earth’s orbit around the sun.

Orbital Period: The number of days it takes for an asteroid to revolve once around the sun. For example, the Earth’s orbital period is 365 days.

Perihelion Distance: The distance between an asteroid and the sun when the asteroid is closest to the sun.

Aphelion Distance: The distance between the asteroid and the sun when the asteroid is farthest away from the sun.

Astronomical unit: A distance unit commonly used to describe orbits of objects around the sun. The distance from the Earth to the sun is one astronomical unit, or 1 AU, equivalent to about 93 million miles or 150 million kilometers.

Diameter: A measure of the size of an asteroid. It is the length of a line from a point on the surface, through the center of the asteroid, extending out to the opposite surface. Irregularly shaped asteroids may have different diameters depending on which direction they are measured.

Rotation Period: The time it takes for an asteroid to complete one revolution around its axis of rotation. For example, the rotation period of the Earth is approximately 24 hours, or 1 day.

Spectral Type: The classification of an asteroid, based on a measurement of the light reflected by the asteroid. 

Watch live launch coverage of OSIRIS-REx to asteroid Bennu starting at 5:30 p.m, on NASA TV: http://www.nasa.gov/nasatv 

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