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Category: space – Page 1,097

Why doesn’t the ISS have a centrifugal gravity module?

There are some very inexpensive ways of testing human effects of spinning motions and artificial gravity in space. We could probably do our first tethre based experiments, and our first short arm centrifuge experiments in space as well, within a year or two of deciding that this is a priority project.

But as for building such a module — it would be expensive to do the module — depending how it works. But not impossibly so. They actually had an idea to do this, the Nautilus X ISS demo, costed as between $83 million and $143 million at the time (2011) and requiring three years to develop, so if they had started then, it would be in space by now:

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‘Impossible’ Device Could Propel Flying Cars, Stealth Missiles

To critics, it’s flat-out junk science, not even worth thinking about. But its inventor, Roger Shawyer, has doggedly continued his work. As Danger Room reported last year, Chinese scientists claimed to validate his math and were building their own version.

Shawyer gave a presentation earlier this week on the Emdrive’s progress at the CEAS 2009 European Air & Space Conference. It answered few questions, but hinted at how the Emdrive might transform spaceflight — and warfare. If the technology works, that is.

The heart of the Emdrive is a resonant, tapered cavity filled with microwaves. According to Shawyer, a relativistic effect generates a net thrust, an effect confirmed by various Emdrives he has built as demonstrations. Critics say that any thrust from the drive must come from another source. Shawyer is adamant that the measured thrust is not caused by other factors.

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Why is the universe flat?

Cosmic inflation is a theory that was proposed in the 1980s by cosmologist Alan Guth to answer some of the most fundamental questions of the origins of our universe. It also solved the Horizon Problem and the Flatness Problem.

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Rosetta mission: Comet 67P is surrounded

The air around the comet that Rosetta landed on has plenty of oxygen, scientists say, potentially changing our understanding of the beginnings of the solar system.

In current theories, oxygen shouldn’t be able to exist in high quantities, and should instead have combined with hydrogen and formed water. But oxygen is the fourth most common gas around the comet.

Professor Kathrin Altwegg, project leader for Rosetta’s Rosina mass spectrometer instrument, said: “We had never thought that oxygen could ‘survive’ for billions of years without combining with other substances.”

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NASA releases full, jaw-dropping view of Pluto’s crescent

Stunning, truly.

NASA has presented us with yet another stunning, backlit view of Pluto, taken by the New Horizons spacecraft during its flyby in July. The photo adds to the growing repertoire of Pluto images that are slowly being downloaded from the probe and released by the space agency. This one shows Pluto’s crescent in full, spectacular detail, completing the partial crescent image that NASA released in mid-September.

The image was taken by New Horizons’ Multi-spectral Visible Imaging Camera (MVIC), just 15 minutes after making its closest approach of Pluto on July 14th. It was taken from 11,000 miles away, when New Horizons looked back at Pluto toward the Sun. The photo shows the hazy layers of the dwarf planet’s atmosphere, as well as the mountains on Pluto’s surface that surround the icy plains of Sputnik Planum.

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