A photometer is the scientific instrument that is sensitive enough to detect a planet transiting a star. Photometers measure the light intensity from stars and can detect the small decreases in brightness that occur when a planet passes in front of its host star, blocking some of the light. This method is commonly used in the search for exoplanets.
What scientific instrument is sensitive enough to detect a planet transiting a star?
satellite radio
a photometer
solar arrays
atomic force microscope
1 answer