artist rendition
Artist's concept

This “hot Jupiter” orbits precariously close to its parent star. While blue in color, like Earth, HD 189733b is much stranger than our own planet. On this turbulent alien world, the daytime temperature is nearly 2,000 degrees Fahrenheit, and it possibly rains glass—sideways—in howling, 4,500 mph winds. The cobalt blue color comes not from the reflection of a tropical ocean, as on Earth, but rather a hazy, blow-torched atmosphere containing high clouds laced with silicate particles. Silicates condensing in the heat could form very small drops of glass that scatter blue light more than red light. The Hubble Space Telescope and other observatories have made intensive studies of HD 189733b and found its atmosphere to be changeable and exotic.

Artwork: ESO/M. Kornmesser

PLANET TYPE
Unknown
DISCOVERY DATE
2005
MASS
Unknown
PLANET RADIUS
Unknown
ORBITAL RADIUS
Unknown
ORBITAL PERIOD
2.2 days
ECCENTRICITY
Unknown
DETECTION METHOD
Radial Velocity