Ultra-Sensitive Camera To Measure Exoplanet Sizes 62
Roland Piquepaille writes "US astronomers and engineers have built a new camera to precisely measure the size of planets moving around distant stars. This camera has been dubbed OPTIC — short for 'Orthogonal Parallel Transfer Imaging Camera.' According to the research team, it is 'so sensitive that it could detect the passage of a moth in front of a lit window from a distance of 1,000 miles.' I'm not sure if this analogy is right, but the team said it was able to precisely define the size of a planet called WASP-10b which is orbiting around the star WASP-10, about 300 light-years from Earth."
doesn't sound very impressive (Score:3, Interesting)
It measures light to a precision of one part in 2,000
So that's 11 bits of intensity information? Most professional camera CCD's are 12 bits per color. Some are 14 bits per color. Doesn't sound very impressive. And with multiple exposures, it should be possible to get a much higher resolution.
The photometric precision is three to four times higher than that of typical CCDs and two to three times higher than the best CCDs, and comparable to the most recent results from the Hubble Space Telescope for stars of the same brightness.
Hmmm, still doesn't sound too impressive. What do they mean by 'typical CCD' anyway?
In any case, it's not more sensitive than the Hubble apparently, so it's probably not going to make any breakthrough discoveries.
Nice, but not news.
Equivalent of a moth at 300ly? (Score:3, Interesting)
(300 light years / 1000 miles) * 2 inches [google.com] == 89 588 337.2 kilometers
So (assuming an average moth is about 2 inches in size) it could make out a planet of about 90 million km (some 64 times wider than Sol) in diameter in front of a star that's 300 light years away, right?