A spacecraft that looks like a giant sunflower might one day be used
to acquire images of Earth-like rocky planets around nearby stars. Starshade, the
prototype deployable structure, is being developed
by NASA's Jet Propulsion Laboratory in Pasadena, Calif.
Researchers generally think it's only a matter of time before we find perfect twins of Earth. The next step would be to image and characterize their spectra, or chemical signatures, which provide clear clues about whether those worlds could support life. The starshade is designed to help take those pictures of planets by blocking out the overwhelmingly bright light of their stars. Simply put, the starshade is analogous to holding your hand up to the sun to block it while taking a picture of somebody.
The hunt is on for planets that resemble Earth in size, composition
and temperature. Rocky planets with just the right temperature for
liquid water -- not too hot, not too cold -- could be possible abodes
for life outside our solar system. NASA's Kepler mission has discovered
hundreds of planets orbiting other stars, called exoplanets, some of
which are a bit larger than Earth and lie in this comfortable
"Goldilocks" zone.
The proposed starshade could launch together with a telescope. Once in space, it would separate from the rocket and telescope, unfurl its petals, then move into position to block the light of stars.
The project is led by Jeremy Kasdin, a professor at Princeton University, N.J., in conjunction with JPL and support from Northrop Grumman of Redondo Beach, Calif.
jpl.nasa.gov
Researchers generally think it's only a matter of time before we find perfect twins of Earth. The next step would be to image and characterize their spectra, or chemical signatures, which provide clear clues about whether those worlds could support life. The starshade is designed to help take those pictures of planets by blocking out the overwhelmingly bright light of their stars. Simply put, the starshade is analogous to holding your hand up to the sun to block it while taking a picture of somebody.
Before unfurling it's petals |
The proposed starshade could launch together with a telescope. Once in space, it would separate from the rocket and telescope, unfurl its petals, then move into position to block the light of stars.
The project is led by Jeremy Kasdin, a professor at Princeton University, N.J., in conjunction with JPL and support from Northrop Grumman of Redondo Beach, Calif.
jpl.nasa.gov
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