10 Dangerous Planet in the Universe
- SciTechDaily
8. KELT-9b
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.
Astronomers believe that exoplanet KELT-9b will lose its entire atmosphere to star KELT-9 in just 200 Earth years.
9. CoRoT-7b
In February 2009, astronomers operating the Convection, Rotation and Planetary Transits (CoRoT) satellite discovered a new exoplanet in the Monoceros constellation 480 light-years away from Earth. They called it CoRoT-7b.
CoRoT-7b is rocky, despite having a rocky surface that could support life, CoRoT-7b is not the place to be.
For starters, its atmosphere is filled with minerals that form rock clouds. These clouds send pebbles and small rocks falling from the skies as if they were rain. Even if humans managed to survive that, they would be destroyed by the insanely hot surface temperature of the exoplanet.
Our own Earth is 60 times farther from our Sun than CoRoT-7b is from its star. In the daytime, the star in the skies of CoRoT-7b appears 360 times bigger than our own Sun looks from here on Earth.
10. HD 189733b
Ilustrasi planet HD 189733b, berwarna biru mirip Bumi
- sci-news.com
In 2005, astronomers discovered a Jupiter-sized exoplanet, HD 189733b, with a distinctive Earthlike blue tint 63 light-years away. However, unlike Earth, HD 189733b was not blue because of its seas and oceans. Instead, the color came from its silicate-rich clouds.
HD 189733b is also dangerous. The first problem is the 8,700-kilometer-per-hour (5,400 mph) winds that blow across the exoplanet. That is seven times the speed of sound, which is insanely fast. For comparison, peak sustained winds of the notorious Hurricane Katrina blew at 280 kilometers per hour (175 mph).
