Tag: engineering

Data collected by a radiation sensor inside Curiosity during its journey to Mars suggest that it will be possible to build ships with sufficient shielding to protect humans on such a voyage.

9:04 pm

Data collected by a radiation sensor inside Curiosity during its journey to Mars suggest that it will be possible to build ships with sufficient shielding to protect humans on such a voyage.

Zeitlin and his colleagues analysed the radiation recorded by a small detector on board the craft that was active during most of the 253-day cruise to Mars. Although the craft was not uniformly protected from exposure to Galactic cosmic rays and charged particles from the Sun, the MSL’s shielding on average approximated that of human space-flight missions. ….

At NASA Langley, Thibeault and her colleagues are testing new types of shielding that consist of hydrogenated materials. Hydrogen offers protection because it breaks apart heavy charged particles without creating secondary particles that add to the radiation dose, she notes. One of the materials under investigation, hydrogen-filled boron nitride nanotubes, looks particularly promising because it is robust and lightweight enough to double as both the skin of a spacecraft and its shield. Using separate materials to build and shield a craft would add too much weight to a Mars-bound mission, Thibeault notes.

Thibeault says that she is heartened by the new study because she had feared that the radiation dose might be considerably higher. The results suggest “that this is a problem we can solve”, she adds.

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The asteroid is coming! The asteroid is coming!

4:35 pm

The asteroid is coming! The asteroid is coming!

The fly-by of the large asteroid 1998 QE2 tomorrow at about 5 pm (Eastern) is causing a lot of hype. It is interesting, but hardly the big news event NASA and others want to make it. The scientists will like it because they get another close look at an asteroid. Others are using it to hype up the threat of asteroids, though that threat is not changed in any way by this fly-by.

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Planetary Resources today announced a Kickstarter fund-raising campaign for its space telescope Arkyd.

11:46 am

Planetary Resources today announced a Kickstarter fund-raising campaign for its space telescope Arkyd.

Forgive me if I am less than enthusiastic about this. Supposedly Planetary Resources had big money backing from a lot of wealthy people, including some Silicon Valley Google billionaires. Why then do they need this campaign? It makes me suspect that the company is an emperor with no clothes.

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Japan has decided to develop its first new rocket in two decades and use the private-sector to reduce costs.

9:09 am

The competition heats up: Japan has decided to develop its first new rocket in two decades and use the private-sector to reduce costs.

The article is very vague about how Japan will shift design and construction to the private sector. They need to do this, however, if they want to compete, as their space agency has been very inefficient at accomplishing anything cheaply or quickly.

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Sunjammer, NASA’s next solar sail experiment.

9:06 am

Sunjammer, NASA’s next solar sail experiment.

Though the article headline focuses on the addition of space weather instruments to this solar sail, the article says very little about those instruments. One, Swan, is described as a “wind instrument”, which probably means it would study the solar wind. The other instrument would study the Earth’s magnetic field. Both instruments are needed to track the effect of the Sun on local space weather, since the one satellite we have to do this, Ace, is now more than a decade past its expiration date.

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Solar Impulse has completed the second leg of its journey to fly across the United States powered only by the sun.

10:50 am

Solar Impulse has completed the second leg of its journey to fly across the United States powered only by the sun.

The Solar Impulse has broken its own record for the longest distance flight of a solar-powered aircraft following the second leg of its journey across the USA. Solar Impulse touched down in Texas at 1:08 a.m. local time after a flight of 18 hours 21 minutes having covered at least 868 miles (1,397 km). Two different distances have been reported for the flight. The Solar Impulse website says the flight “amounted” to 868 miles (1,397 km). However, according to a Phys.org report, Solar Impulse covered a distance of 1,541 km (which it rounds to 950 miles, though this is not the precise conversion).

It is thought the two distances exist because the plane actually lost ground during part of its flight due to headwinds.

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The Russian deputy prime minister told students at the Moscow Aviation Institute on Thursday that they expect their first launch from their new spaceport in Vostochny to occur in November 2015.

8:00 am

The competition heats up: The Russian deputy prime minister told students at the Moscow Aviation Institute on Thursday that they expect their first launch from their new spaceport in Vostochny to occur in November 2015.

He also said that they want to name the new town they are building at the site after Konstantin Tsiolkovsky.

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The Russians announced that they plan nine more Proton rocket launches in 2013, for a total of twelve.

9:52 am

The competition heats up: The Russians announced today that they plan nine more Proton rocket launches in 2013, for a total of twelve.

I note this to give some context to what SpaceX will do with Falcon 9 this year. SpaceX has just updated its launch manifest schedule, and if the American company does what it says, it should have at least six more Falcon 9 flights this year, for a total of seven.

Should these predicted launches all take place, it will clearly demonstrate that SpaceX has grabbed a significant share of the launch market, but that the Russians are also holding their own.

Note also that the updated launch manifest still includes the first test flight of Falcon Heavy in 2013. Very interesting.

Update: The Russians are also preparing to launch their new Angara rocket family, which will replace their older rockets and allow them to launch from their new spaceport.

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A new Defense Department report says that China is aggressively ramping up its space program.

8:39 am

The competition heats up: A new Defense Department report says that China is aggressively ramping up its space program.

China will continue to augment its orbiting assets, with the planned launch of 100 more satellites through 2015. These launches include imaging, remote sensing, navigation, communication and scientific satellites, as well as manned spacecraft.

China is pursuing a variety of air, sea, undersea, space, counterspace and information warfare systems, as well as operational concepts, moving toward an array of overlapping, multilayered offensive capabilities extending from China’s coast into the western Pacific. China’s 2008 Defense White Paper asserts that one of the priorities for the development of China’s armed forces is to “increase the country’s capabilities to maintain maritime, space and electromagnetic space security.”

Further, China continues to develop the Long March 5 rocket, which is intended to lift heavy payloads into space. LM-5 will more than double the size of the Low Earth Orbit (LEO) and Geosynchronous Orbit (GEO) payloads China is capable of placing into orbit. To support these rockets, China began constructing the Wenchang Satellite Launch Center in 2008. Located on Hainan Island, this launch facility is expected to be complete sometime this year 2013, with the initial LM-5 launch scheduled for 2014.

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A Russian Bion-M spacecraft, filled with mice, lizards and other animals, returned to Earth after 30 days in space with about half its mice and all its gerbils dead.

8:45 am

A Russian Bion-M spacecraft, filled with mice, lizards and other animals, returned to Earth after 30 days in space with about half its mice and all its gerbils dead.

The Bion-M experiment, launched from Baikonur, Kazakhstan, on April 19, carried 45 mice, 15 geckos, 18 Mongolian gerbils, 20 snails and a number of different plants, seeds and microorganisms, according to a Russian state news site. About half of the mice died, but the lizards reportedly survived. The Mongolian gerbils all expired, apparently due to an equipment failure, said Vladimir Sychev of the Russian Academy of Sciences, according to AFP.

It is unclear at this moment whether it was the harsh environment of weightlessness or equipment failure that caused the mortalities.

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The Mars rover Opportunity has now traveled farther than any other American rover, including the Apollo 17 rover on the Moon.

4:15 pm

The Mars rover Opportunity has now traveled farther than any other American rover, including the Apollo 17 rover on the Moon.

The team operating NASA’s Mars Exploration Rover Opportunity received confirmation in a transmission from Mars today that the rover drove 263 feet (80 meters) on Thursday, bringing Opportunity’s total odometry since landing on Mars in January 2004 to 22.220 statute miles (35.760 kilometers). … The international record for driving distance on another world is still held by the Soviet Union’s remote-controlled Lunokhod 2 rover, which traveled 23 miles (37 kilometers) on the surface of Earth’s moon in 1973.

We have to once again remind ourselves that the roving part of Opportunity’s mission was originally only supposed to last 90 days, not 9 years.

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