Sally Ride, Rest in Peace

Sally Ride, America's first woman in space, died on Monday at the age of 61.  Ms. Ride's first entered the Earth's orbit via the Challenger Space Shuttle about 29 years ago on June 18, 1983.  Her list of accomplishments beyond this event is quite impressive:

-- Ph.D. in physics from Stanford. 
-- Joined NASA in 1978.
-- Helped develop a shuttle robot arm for NASA.
-- Part of the Rogers Commission to investigate the Challenger explosion in 1986.
-- Part of the commission to investigate the Columbia explosion in 2003.
-- Member of the Augustine Committee to make recommendations on the future of human spaceflight.
-- Science fellow at the Center for International Security and Arms Control at Stanford University.
-- Professor of physics at the University of California in San Diego.
-- Started Sally Ride Science in 2001 to encourage children to seek careers in science and technology.

While she was not the first woman in space, with Russia being the first nation to do so in 1963 (while China hit this goal earlier this year), Ms. Ride certainly blazed a bright trail for other woman to follow. She may also be the first gay astronaut.  Sally Ride Science's obituary noted:

In addition to Tam O’Shaughnessy, her partner of 27 years, Sally is survived by her mother, Joyce; her sister, Bear; her niece, Caitlin, and nephew, Whitney; her staff of 40 at Sally Ride Science; and many friends and colleagues around the country.

Most importantly, as her organization's biography noted, was her love of space and determination to share it with others:

Sally’s historic flight into space captured the nation’s imagination and made her a household name. She became a symbol of the ability of women to break barriers and a hero to generations of adventurous young girls. After retiring from NASA, Sally used her high profile to champion a cause she believed in passionately—inspiring young people, especially girls, to stick with their interest in science, to become scientifically literate, and to consider pursuing careers in science and engineering.

Sally, we wish you well on your new voyage.

Great Images: Jupiter and Ganymede

This image is part of the NASA Planetary Photo Journal Collection and found at nasaimages.org. Here is the photo's accompanying text:

The solar system's largest moon, Ganymede, is captured here alongside the planet Jupiter in a color picture taken by NASA's Cassini spacecraft on Dec. 3, 2000.

Ganymede is larger than the planets Mercury and Pluto and Saturn's largest moon, Titan. Both Ganymede and Titan have greater surface area than the entire Eurasian continent on our planet. Cassini was 26.5 million kilometers (16.5 million miles) from Ganymede when this image was taken. The smallest visible features are about 160 kilometers (about 100 miles) across.

The bright area near the south (bottom) of Ganymede is Osiris, a large, relatively new crater surrounded by bright icy material ejected by the impact, which created it. Elsewhere, Ganymede displays dark terrains that NASA's Voyager and Galileo spacecraft have shown to be old and heavily cratered. The brighter terrains are younger and laced by grooves. Various kinds of grooved terrains have been seen on many icy moons in the solar system. These are believed to be the surface expressions of warm, pristine, water-rich materials that moved to the surface and froze.

Ganymede has proven to be a fascinating world, the only moon known to have a magnetosphere, or magnetic environment, produced by a convecting metal core. The interaction of Ganymede's and Jupiter's magnetospheres may produce dazzling variations in the auroral glows in Ganymede's tenuous atmosphere of oxygen.

Cassini is a cooperative project of NASA, the European Space Agency and the Italian Space Agency. The Jet Propulsion Laboratory, a division of the California Institute of Technology in Pasadena, manages the Cassini mission for NASA's Office of Space Science, Washington, D.C. 

Here is an earlier shot of Ganymede from NASA's Jet Propulsion Laboratory's Photojournal page:  

In this global view of Ganymede's trailing side, the colors are enhanced to emphasize color differences. The enhancement reveals frosty polar caps in addition to the two predominant terrains on Ganymede, bright, grooved terrain and older, dark furrowed areas. Many craters with diameters up to several dozen kilometers are visible. The violet hues at the poles may be the result of small particles of frost which would scatter more light at shorter wavelengths (the violet end of the spectrum). Ganymede's magnetic field, which was detected by the magnetometer on NASA's Galileo spacecraft in 1996, may be partly responsible for the appearance of the polar terrain. Compared to Earth's polar caps, Ganymede's polar terrain is relatively vast. The frost on Ganymede reaches latitudes as low as 40 degrees on average and 25 degrees at some locations. For comparison with Earth, Miami, Florida lies at 26 degrees north latitude, and Berlin, Germany is located at 52 degrees north.

North is to the top of the picture. The composite, which combines images taken with green, violet, and 1 micrometer filters, is centered at 306 degrees west longitude. The resolution is 9 kilometers (6 miles) per picture element. The images were taken on 29 March 1998 at a range of 918000 kilometers (570,000 miles) by the Solid State Imaging (SSI) system on NASA's Galileo spacecraft.

The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC.

Anniversary of Skylab's Return to Earth

Thirty-three years ago on July 11 America's Skylab returned to earth in pieces littering the Indian Ocean and Australia.  First launched in 1974, Skylab was America's first space station and hosted three sets of 3-man U.S. space crews during its operation, with the station itself having been occupied a total of 171 days.  The station may have lasted longer had the new NASA Space Shuttle program been further along to repair the station and adjust its orbit.

What did Skylab accomplish? According to a NASA paper on the program, the primary impact was highlighting the value of a manned operation:

While the program unquestionably yielded valuable scientific information, its greatest value came from its demonstration of the importance of the human element in the space program. As John Disher, NASA Director of Advanced Programs in the Office of Space Transportation Systems, would later note, Skylab "turned around many people who thought men in space were a hindrance rather than a help." Echoing this sentiment, Program Director William Schneider stated that Skylab had shown that, regarding the space program, "the limit is only our resolve, not the ability of men to work, and not our technical knowledge." 

We need more of that resolve as we look to future manned missions.

The U.S. Still Has a Space Shuttle Program

Even with the demise of NASA's shuttle program, we should remember that the United States has been running a separate shuttle program under the Pentagon that is alive and well.  The USAF has been operating the X-37B unmanned shuttle, or  Orbital Test Vehicle-2 (OTV-2), which safely landed last month after being aloft since March 5, 2011.  This is the X-37B's second flight, the first one taking place in 2010 and lasting 244 days.

The X-37B is not only unmanned but also considerably smaller than the better known space shuttles, being only 29 feet long and 15 feet wide.  This mini-shuttle was originally planned by NASA and later picked up by the USAF.  A second larger craft, the X-37C, is also in the works.  This larger shuttle should be able to carry crew and cargo.

Earlier stories in The Register also discusses various aspects of the "secret" mini-shuttle program as well as NASA's shuttle program:

-- NASA saw the craft as a potential "lifeboat" for the International Space Station;
-- The X-37B is supposed to be much more advanced in terms of turnaround time, heat shields, and more than the Shuttle.
-- It is often forgotten nowadays that the Shuttle was originally intended not just for NASA operations from Cape Canaveral, but also for military operations from a dedicated complex at Vandenberg Airforce Base in California;
-- Hopes for out of the X-37B seem likely to focus on the same things the Air Force originally wanted from the Shuttle: mainly the ability to recover horrifyingly expensive surveillance hardware from space for repairs, replenishment of manoeuvring fuel and/or upgrading; and
-- If you want to get out into the wilder speculative realms you could postulate a mission lifting off to retrieve, not a US satellite, but someone else's. The initial launch would be explained as delivery of a normal secret payload, but in fact the spaceplane would lift empty, scoop up its target on one pass and return to land on a "Mission 3B" style profile without ever flying above a hostile telescope or radar station.

And how does the USAF describe the X-37B?  Here is what their factsheet says: "The primary objectives of the X-37B are twofold: reusable spacecraft technologies for America's future in space and operating experiments which can be returned to, and examined, on Earth."

Other space-faring nations see it a little differently.  Quoted in China Daily, Zhao Xiaozhuo, a research fellow of military studies under China's Academy of Military Science of the People's Liberation Army, said "As a superpower, the US has been calling for nuclear disarmament all these years and urged other countries to be more responsible for world peace and safety...But in the meantime, its development of the space plane may lead to an arms race in space." Of course, the Chinese have more and more happening in orbit, from spy satellites to space station missions, so their paranoia is understandable.

So it appears the U.S. has the funds to operate a separate space program with its own shuttles.  And now it is moving towards manned shuttles while NASA has no means to assist our astronauts in the International Space Station without the assistance of the Russians.  Does this make sense?

Chinese space success has been partly attributed to the combined civilian and military space program.  I can only wonder if two pots of money is really better than one, not to say the two are not already mixed.  While NASA and the USAF maintain separate launch facilities in Florida, the NASA space shuttle program was often used to launch military satellites. 

Maybe in a time of scarce resources, or at least the perception of scarce resources, more should be done to share equipment and even missions.  Yes, we want a "peaceful" and scientific NASA space program, but we are only kidding ourselves if we think NASA stands completely separate from our national defense goals.  The very existence of NASA is owed to its role in beating our Cold War adversary to the moon, and now we are facing other nations also racing to the moon while NASA seems to lack a meaningful manned mission.  And let's not forget the science done by Napoleon when he arrived in Egypt or Darwin when he was aboard the HMS Beagle, a 10-gun brig-sloop of the Royal Navy.  It may be time for some new thinking.

Interesting Note:   The British-built Beagle 2 was sent to Mars for scientific studies as part of the European Space Agency's (ESA) Mars Express mission.  Unfortunately, ESA lost contact with the Beagle 2 just before it was scheduled to land on the Martian surface.

The Planetary Society is Having a Curiosity Party

The Planetary Society will be watching and hopefully celebrating the successful landing of the Curiosity rover on Mars next month.  You can join the Society members at Planetfest 2012, being held August 4th and 5th in Pasadena, CA.   The purpose of the gathering is pretty simple: 

Few space events carry the power of a Mars landing in real-time – experienced with a community of other people interested in space, and with experts describing the process as it unfolds.  It’s nail-biting time as the countdown nears – to the yet unknown success or failure of one of engineering’s greatest feats, a landing on an alien world.  Discussions and entertainment wrap around the actual landing, building excitement and also knowledge, especially for future explorers.

Other similar events are being held in other parts of the country.  Check here for the latest list.

Whether or not you can attend an event you can still watch Planetfest 2012 via webcast.  Wherever you might be, you will want to watch this historic event.

Curiosity Landing Takes Place Next Month

NASA's Curiosity rover is scheduled to land on the surface of Mars on August 5th (at exactly 10:31 pm PT).  It will be nice to see more U.S. exploration of Mars, even if it is only a robotic mission.  Launched aboard an Atlas V on November 26, 2011, from the Cape Canaveral Air Force Station, the car-sized rover has been slowly making its way to the Red Planet these past seven and a half months.

NASA has put together a nice video called 7 Minutes of Terror describing the 7 minutes from the time the spacecraft carrying Curiosity hits the Martian atmosphere to the point of landing on the surface.  I would all it 8 months of terror given the complexity of the mission, but I am not writing the script.  Given the fact that the entire landing had to be perfectly choreographed long ago and will happen without any intervention from NASA once it starts, in some ways the mission is more amazing and complex than one including human intervention.  I away find these missions, be it landing on the surface of a planet to looping around the solar system for the perfect fly-by of a distant planet, to be a more spectacular demonstration of mankind's ability than the construction of the pyramids or Notre Dame. 

If all goes well, which is always a question when traveling to Mars (just ask the Russians), Curiosity will begin its two-year exploration of Gale Crater and the informally named Mount Sharp, described by NASA as follows:

Mount Sharp rises about 3 miles (5 kilometers) above the landing target on the crater floor, higher than Mount Rainier above Seattle, though broader and closer. It is not simply a rebound peak from the asteroid impact that excavated Gale Crater. A rebound peak may be at its core, but the mountain displays hundreds of flat-lying geological layers that may be read as chapters in a more complex history billions of years old.

Twice as tall as the sequence of colorful bands exposed in Arizona's Grand Canyon, the stack of layers in Mount Sharp results from changing environments in which layers are deposited, younger on top of older, eon after eon, and then partially eroded away.

A successful landing will be the start of a new period of exploration and hopefully offer new insights to the life of Mars and maybe even the likelihood of prior life on Mar.  One can also hope that this mission will renew interest in future trips to Mars, including a manned mission down the road.  It is worth recalling that Curiosity itself was planned before President Obama took office and quite possibly would not have been possible under this Administration.  Moreover, the United States has already pulled out of ExoMars, another Mars mission planned with our European friends, forcing them to look to Russia for a reliable partner. Let's hope we can get past our current Earth-bound problems and reach for the stars (or at least neighboring planets) again.

Note:  Mount Sharp (shown below in terms of size) pays tribute to geologist Robert P. Sharp (1911-2004), a founder of planetary science, influential teacher of many current leaders in the field, and team member for NASA's first few Mars missions. Sharp taught geology at the California Institute of Technology (Caltech), in Pasadena, from 1948 until past his retirement. Life magazine named him one of the 10 best college teachers in the nation.

"I think we have it"

With that statement, Rolf-Dieter Heuer, director general of CERN, announced the existence of the elusive Higgs-like particle.

So what does it all mean?  Here is how CERN describes the situation in its July 4 press release: 

The Standard Model describes the fundamental particles from which we, and every visible thing in the universe, are made, and the forces acting between them. All the matter that we can see, however, appears to be no more than about 4% of the total. A more exotic version of the Higgs particle could be a bridge to understanding the 96% of the universe that remains obscure.

So, in other words we have now found about 96 percent of the universe.  I guess that helps to fill the gap in our knowledge.  London's The Guardian put it high on the list of scientific achievements: 

The discovery of the Higgs particle ranks as one of the most important scientific advances of the past 100 years. It proves there is an invisible energy field that pervades the vacuum of the known universe. This field is thought to give mass to the smallest building blocks of matter, the quarks and electrons that make up atoms. Without the field, or something like it, there would be no planets, stars, or life as we know it.

The BBC covers the topic well in this documentary.  The story adds some useful context to the topic.

Update:  Slate magazine has a good analogy for explaining Higgs bosom:

Imagine a room full of physicists. Suddenly Einstein enters and attempts to cross the room, but the star-struck physicists cluster around him and impede his movements, effectively increasing his mass. Now imagine that I enter the room. As a lowly grad student, nobody wants to interact with me, so I pass through the physicists relatively unimpeded—no effective mass for me! Lastly, imagine that somebody whispers a rumor, causing the physicists to cluster together excitedly on their own.

In this analogy, the room full of physicists represents the Higgs field in space, Einstein represents a particle with high mass, I represent a particle with low mass (or no mass), and a cluster of physicists represents an excitation of the field, which is effectively a Higgs boson.