DNA can survive atmosphere re-entry

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747px-EntryOn March 29, 2011, a TEXUS-49 rocket took off from northern Sweden for a short trip into space and back through Earth’s sheltering blanket of atmosphere. This amazing feat of engineering has become surprisingly routine — we humans have gotten to the point where launching a vehicle into space to carry out an experiment or deliver a satellite into orbit no longer inspires awe and wonder. Sounding rockets are commonly used as sub-orbital research platforms. In this case, one of the experiments on the mission was a test of how well DNA molecules can survive the temperatures involved in plummeting back through Earth’s atmosphere. The results, published earlier this year in PLOS ONE, show that DNA is tough enough to make it through atmospheric re-entry after a quick jaunt in space. Continue reading

Survey for science bloggers

Paige Brown Jarreau is doing a PhD in science communication at Louisiana State University, and part of her research focuses on science bloggers. She’s surveying science bloggers about their blogging practices to gather data for her research. Since I know some of the regular readers of Inspiring Science are also science bloggers in their own right, I thought I’d try to help Paige by linking to her survey in case some of you want to participate. She’s also offering a $7.00 gift voucher from Amazon to the first 200 respondents.

Hello, 67P/C-G!

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Earlier today, the Rosetta lander Philae successfully docked with the comet it’s going to study, 67P/Churyumov-Gerasimenko! By now, the lander is busily doing science on the surface of a comet. Not bad for a robot built by a bunch of curious apes! Congratulations to everyone involved, and thanks for all the hard work!

Over the next few days, Philae will take plenty of pictures of the landing site, analyse the comet’s surface materials, drill out a chunk of the comet for analysis in the onboard laboratory, and measure the electrical and mechanical properties of the surface. It will also cooperate with Rosetta to study the comet’s internal structure by sending low-frequency radio waves through it. Philae’s primary battery will only last for a few days; after that, a secondary, rechargeable battery may keep it going until March if the solar panels don’t get blocked.

Rosetta’s job isn’t over yet. While Philae is studying the comet up-close, the spacecraft will keep orbiting the comet as it gets closer and closer to the Sun. In August, the comet will be at its closest to the Sun — ‘only’ 185 million kilometers, which is still slightly farther out than the Earth’s orbit. Rosetta will ride through the approach and stay with it on the outward journey, beaming back data the whole way. So there’s a lot to look forward to from Philae in the coming days and from Rosetta in the coming months!

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The picture, courtesy of the ESA, was taken by Philae during its descent; the lander was about 3km above the comet’s surface. Congratulations to the Rosetta team!

Selfie from space!

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Rosetta selfieHello again, Rosetta! After a ten year journey, the spacecraft is only 16km from the comet it’s been sent to explore. Earlier this week, it sent back this selfie showing one of its solar panels and the comet, 67P/Churyumov-Gerasimenko. It’s an awe-inspiring image. A decade ago, we hurled this little ship out into cold, dark space. It looped around the solar system several times, sending back pictures of Mars and Earth as it looped past us to pick up speed. Barrelling out past the Mars’ orbit, it went to sleep to conserve power. Thanks to the hard work and careful planning of the ESA team, it managed to rendez-vous with the 4km wide comet after a journey of over 6 billion kilometers! That’s amazing! And now it’s sending back pictures as the two of them flirt and dance around each other while Rosetta looks for a place to put down its lander, Philae. Well done, humankind! And congratulations to the Rosetta team!

There’ll be more news next month, when the docking itself should take place. Once on the comet, Philae will send back data for anywhere from a few days to a few months — we simply don’t know how long it will last on the comet’s surface.

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The picture is, of course, from the ESA. Well done!

Notes from a quantum mechanics boot camp: day 3

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With the third and final day of the workshop done, it’s time for me to wrap up this series on Inspiring Science. While this will be my last post about the workshop, I’m sure it won’t be the last time I write about these topics. I learned a great deal in the past few days, enough to increase both my interest in and confidence about covering physics topics. Before getting to the actual science, I want to thank the organisers, sponsors, and participants for an excellent and fruitful workshop. I hope the series continues and I look forward to coming back next year! Continue reading

Notes from a quantum mechanics boot camp: day 2

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I didn’t have the energy to write about quantum computing last night, but fortunately I can make up for it in today’s post, since that was the main subject of the day — quantum information science and computing. Again, I’ll do my best to get the main idea across, but I’m sure it’s something I’ll revisit again in the future. Continue reading