We have discovered thousands of exoplanets in recent years.
, where an optical telescope measures the brightness of a star over time. If the star dips very slightly in brightness, it could indicate that a planet has passed in front of it, blocking some of the light.
This radio image of Jupiter was captured by the Very Large Array in New Mexico. The three colors in the picture correspond to three different radio wavelengths: 2 cm in blue, 3 cm in gold, and 6 cm in red. In thisThey based their model on magnetohydrodynamics , which describes how magnetic fields and ionized gases interact, and applied it to a planetary system known as HD 189733, which is known to have a Jupiter-sized world.
For one, the team showed that the planet would produce a clear light curve. That is a radio signal that varies because of the motion of the planet. This is great because radio observations of motion are extremely precise. Even more precise than optical Doppler observations.
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