These deadly planets are ready to kill any creature that strays too close or tries to develop on them. Most of the planets on this list are not just too hot or cold. They have more terrible conditions that will never support life.
CoRoT-7b
CoRoT-7b is an exoplanet orbiting around the star CoRoT-7, in the constellation Monoceros, at 489 light years from Earth. It was first detected photometrically by the French-led CoRoT mission and reported in February 2009.
The exoplanet Corot-7b is so close to its Sun-like host star that it must experience extreme conditions. This planet has a mass five times that of Earth’s and is in fact the closest known exoplanet to its host star, which also makes it the fastest — it orbits its star at a speed of more than 750 000 kilometres per hour. The probable temperature on its “day-face” is above 2,000 degrees, but minus 200 degrees on its night face. Theoretical models suggest that the planet may have lava or boiling oceans on its surface. Our artist has provided an impression of how it may look like if it were covered by lava. The sister planet, Corot-7c, is seen in the distance.
HD 189733b
HD 189733 b is an exoplanet approximately 64.5 light-years away from the Solar System in the constellation of Vulpecula. The planet was discovered orbiting the star HD 189733 on October 5, 2005, when astronomers in France observed the planet transiting across the face of the star.
This Halloween, take a tour with NASA's Exoplanet Exploration site of some of the most terrifying and mind-blowing destinations in our galaxy. In this image, the nightmare world of HD 189733 b is the killer you never see coming. To the human eye, this far-off planet looks bright blue. But any space traveler confusing it with the friendly skies of Earth would be badly mistaken. The weather on this world is deadly. Its winds blow up to 5,400 mph (2 km/s) at seven times the speed of sound, whipping all would-be travelers in a sickening spiral around the planet. And getting caught in the rain on this planet is more than an inconvenience; it’s death by a thousand cuts. This scorching alien world possibly rains glass—sideways—in its howling 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.
Upsilon Andromedae b
Upsilon Andromedae is a binary star located approximately 44 light-years from Earth in the constellation of Andromeda. The system consists of an F-type main-sequence star and a smaller red dwarf.
The exoplanet is too close to its sun, completing an orbit in just 4.6 days. As you may have guessed, this suggests that it is tidally locked, with one side permanently facing the sun and one unbelievably hot.
Interestingly, the hottest area, the “warm spot,” does not face the star. Instead, it is on the side that never receives sunlight. This discovery puzzled astronomers because the side facing the star should be hotter. Astronomers believe that things are a bit different here because the wind transfers the heated air to the opposite side of the exoplanet.
WASP-121b
WASP-121b is an extrasolar planet orbiting the star WASP-121. WASP-121b is the first exoplanet found to contain water in an extrasolar planetary stratosphere. WASP-121b is in the constellation Puppis, and is about 850 light-years from Earth.
WASP-121b is so close to its star that temperatures hover around 2,540 degrees Celsius (4,600 °F). Solid or liquid objects cannot form there, and everything just remains in a gaseous state. This includes its metallic atmosphere, which is filled with iron and magnesium gases. Worse, the exoplanet is losing this atmosphere to its star, just like KELT-9b.
KELT-9b
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| Image: © NASA -NASA/JPL-Caltech |
KELT-9b is an exoplanet—more specifically, an ultra-hot Jupiter—that orbits the late B-type/early A-type star KELT-9, located about 670 light-years from Earth. Detected using the Kilodegree Extremely Little Telescope, KELT-9b was announced in 2016.
Exoplanet KELT-9b is the hottest planet we have ever found. The temperature of its star is around 9,700 degrees Celsius (17,500 °F), which is almost two times the 5,480-degree-Celsius (9,900 °F) surface temperature of our Sun. The daytime temperature on the exoplanet hovers around 4,300 degrees Celsius (7,800 °F), which is still insanely hot. Most stars in the universe do not even come close.
TrES-2b
TrES-2b is an extrasolar planet orbiting the star GSC 03549-02811 located 750 light years away from the Solar System. The planet has been identified in 2011 as the darkest known exoplanet, reflecting less than 1% of any light that hits it.
TrES-2b is black because its atmosphere absorbs over 99 percent of the light it receives from the sun. Astronomers believe that the exoplanet reflects so little light because its atmosphere is filled with vaporized sodium and potassium or gaseous titanium oxide.
Black in nature doesn't mean that this planet is cool.In fact, its temprature reach over 980 degree celsius.This extremely high temperature causes some parts of the exoplanet to emit a red glow, just like burning coal or electric stove coils. Astronomers also suspect that the exoplanet is so close to its star that both are tidally locked.
OGLE-2005-BLG-390Lb
OGLE-2005-BLG-390Lb is a super-Earth exoplanet orbiting OGLE-2005-BLG-390L, a star 21,500 ± 3,300 light years from Earth near the center of the Milky Way. It is one of the most distant planets known and have ery thin atmosphere located right in the middle of the mlkeyway.Which make this planet very cold.
The surface temperature on OGLE-2005-BLG-390Lb is around -220 degrees Celsius (-364 °F), which is too low to support life as we know it. For comparison, by some accounts, the lowest temperature ever recorded here on Earth is -97.8 degrees Celsius (-144 °F). The temperature was recorded in an area of ice-cold Antarctica that has never seen sunlight. An attempt to breathe in that area will destroy our lungs and cause instant death.
OGLE-TR-56b
OGLE-TR-56b is an extrasolar planet located approximately 5000 light year ( 1500 persecs) away in the constellation of Sagittarius, orbiting the star OGLE-TR-56. This planet was the first known exoplanet to be discovered with the transit method.
It is one of the “hot Jupiters” we talked about earlier. Hot Jupiters are often formed farther out in their stellar systems and later move closer to their stars.Planet OGLE-TR-56b has already moved too close to its own star.It is so near that a year is 29 hours long, and the exoplanet’s surface temperature reaches 2,000 kelvins. Over there, the clouds are not made of water but of vaporized iron. Rain falls to the ground as hot liquid iron.
Proxima Centauri b
Proxima Centauri b is an exoplanet orbiting in the habitable zone of the red dwarf star Proxima Centauri, which is the closest star to the Sun and part of a triple star system.It orbits Proxima Centauri, a red dwarf star 4.24 light-years away from Earth. The exoplanet interested astronomers who thought that it had water and Earthlike properties. However, they soon discovered that they were wrong.
This planet can complete its one orbit around the sun in 11.2 days and it is alo tidaly locked, causes one side facing sun which have high temprature other side without exposure of sunlight makes coolder side.
One characteristic of such stars is their tendency to release solar flares every two to three months that strike the planets orbiting around the stars. Those flares would destroy the ozone layers of those planets, making them vulnerable to ultraviolet radiation from the stars.
Scienctists observed one such event on March 24, 2017, when Proxima Centauri released a solar flare toward exoplanet Proxima b. The flare was so intense that the star became 1,000 times brighter within 10 seconds. Proxima b received 4,000 times the radiation that reaches the Earth from solar flares. That is bad for anything living on the exoplanet.
Venus
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| Image: © NASA -NASA/JPL-Caltech |
Venus is the second planet from the Sun. It is named after the Roman goddess of love and beauty. As the second-brightest natural object in the night sky after the Moon, Venus can cast shadows and can be, on rare occasion, visible to the naked eye in broad daylight.
Without a doubt, Venus is the deadliest planet in our solar system thanks to its sulfur dioxide–rich clouds. Those clouds prevent useful sunlight from reaching the planet’s surface and stop deadly carbon dioxide from leaving the atmosphere.The surface of Venus is filled with volcanoes that emit large amounts of heat and carbon dioxide. The large deposit of carbon dioxide makes Venus poisonous for humans. The thick clouds also trap heat and gas, making the planet lethally hot. Temperatures reach a hostile 467 degrees Celsius (872 °F).This hot temprature remain constant all over the planet.Even the night are as hot as the days .
Venus also having rain and snow,although things are quite different than what occure on Earth.he snow is not made of liquid but of galena and bismuthinite metals. Rainfall is composed of deadly sulfuric acid.
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