What is a Hot Jupiter?

Hot Jupiter is a Jupiter-like planet whose orbit is very close to its host star. Such planets can be found in other galaxies. They can be larger than Jupiter, and their orbits can be closer than Mercury to the sun, up to 0.05 astronomical units.

Hot Jupiter

According to the National Aeronautics and Space Administration (NASA), the Spitzer Space Telescope captured light from exoplanets for the first time. The resulting planetary spectrum makes it possible for scientists to determine the molecular composition of the planet's atmosphere in outer space. The discovery was landmark and scientists took an important step towards detecting potential life on planets in outer space.

Using the "Second Eclipse" [Secondary Eclipse] technology, the Spitzer Space Telescope has obtained detailed spectral information of two transiting planets outside the solar system. The two planets made of gas are what scientists call "Hot Jupiter," HD 209458b and HD 189733b, respectively. What theoretical researchers know of "hot Jupiter" is that the data shows that the two planets are drier than previously expected, they are covered by clouds, and the atmosphere does not contain a large amount of water.

Astronomers such as Jeremy Richardson of NASA's Goddard Space Flight Center believe that water may be covered by thick silicate clouds at high altitude detected by spectrum. Their paper on the spectral description of the planet HD 209458b was published in the February 22 issue of Nature.

In addition to Richardson's group, two research groups led by Dr. Carl Grillmair of NASA's Spitzer Science Center at California Institute of Technology and Mark R. Swain of the American Jet Propulsion Laboratory (JPL) also conducted HD 189733b and HD 209458b Observations have reached similar conclusions. Their findings are expected to be published in Astrophysical Journal Letters.

The new horizon "Extreme Weather" mentioned that the wind speed on Hot Jupiter can reach more than 9,600 km / h. It is the wind that maintains the thermal balance on both sides of Hot Jupiter.