They can
detect brightness dips as small as 1 %, which is sufficient to find giant gaseous planets that are like our own Jupiter and Saturn.
Not exact matches
The transit method of
detecting planets that Kepler scientists use involves looking for
dips in a star's
brightness, caused by a planet blocking a fraction of the starlight (similar to how the moon eclipses the sun).
The orbiting probe
detects small
dips in the
brightness of a star that occur when a planet crosses its face.
But with needle - in - haystack projects, I always wonder whether they saw nothing because there was nothing to
detect or because they missed the rare and transient
brightness dips that small KBOs would cause.»
Using an instrument called a photometer, which measures
brightness very accurately, researchers can
detect those
dips and — from their duration and frequency — can deduce the size of the exoplanet and its orbit.
To bring you up to speed, the main method NASA is using to identify potential planets is by
detecting «transits,» which are
dips in a star's
brightness caused by something passing in front of it.
Astronomers have been stuck with this nagging question ever since a team of citizen scientists from the Planet Hunters project first
detected a series of very strange
dips in the star's
brightness back in 2011, while analysing data that had been gathered by NASA's Kepler spacecraft.
It is being done by the people who launched the Kepler satellite to
detect small
dips in the
brightness of distant stars in order to
detect the presence of now ~ 1000 new planets in the last several years, completely re-writing the textbooks on the parameter space of planetary atmospheres, solar system formation, etc..