Even though Venus is much closer to the Sun than Earth is, it absorbs less sunlight because of its thick clouds.
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However, enough sunlight makes its way down into the lower atmosphere and the surface. This sunlight is absorbed and reradiated as infrared radiation. On Earth, the infrared radiation goes back into space.
Venus Is So Hot Because of the Greenhouse Effect
On Venus, the thick carbon dioxide clouds trap the infrared radiation, heating the planet. All except two of the planets would be rotating the same way.
Venus rotates clockwise on its axis. Among several possible additions to the mission are a small sub-orbiter to study Venus' magnetosphere, and either a balloon or an UAV taking measurements of the atmosphere over a long duration. Should the UAV be approved, its main goal would be to take meteorological measurements to determine why the atmosphere rotates so fast relative to the surface, a phenomenon known as super-rotation. This fast rotation was discovered in the s by astronomers tracking the motion of the dark streaks in the atmosphere. Puzzlingly, astronomers do not know the origin and composition of these dark streaks, nor do they understand why the streaks haven't mixed with the rest of the atmosphere and why they are absorbing ultraviolet light.
According to Limaye, the nature of the UV absorber is completely unknown.
Venus Is Very Similar to, but Also Very Different from, Earth
It could be particulate matter mixed into the clouds, or a substance that has been dissolved by the droplets of sulfuric acid, or it may be crystalline in nature, like ice. Iron chloride has been proposed, but there is no confirmed mechanism that could loft particles of iron chloride 31 to 37 miles 50 to 60 kilometers above the surface, particularly as winds near the surface only blow weakly through the dense lower atmosphere. A more exciting explanation for the dark streaks is that they are evidence of microbial life.
Finding life at high altitude in the atmosphere of a planet would make sense.
After all, microbes have been found at similar heights in Earth's atmosphere. The challenge for life on Venus is the planet's extreme temperature. The surface, at degrees Fahrenheit degrees Celsius , is hot enough to melt lead, and the surface pressure of 92 bar is the equivalent of being almost 0.
European Probe Survives Daring Dive Through Venus Atmosphere
However, in a region beginning around 31 miles 50 m in altitude and extending 7. Life could potentially survive in this zone where the dark-streaking UV absorber is found. Intriguingly, the sulfuric acid droplets within the clouds aren't necessarily a show-stopper to life.
In the men's tournament, Roger Federer's latest victory never looked in doubt as he won 37 of 40 first-serve points and stretched his Wimbledon winning streak to 29 sets, beating Jan-Lennard Struff of Germany , , The eight-time champion and No. Venus couldn't complete a third consecutive comeback as she lost to 20th-seeded Kiki Bertens of the Netherlands , 5 , in the third round on Friday. You have to win the last point, and I didn't succeed in that today.
Could dark streaks in Venus' clouds be microbial life?
She is the fourth former women's champion to get knocked out, joining Maria Sharapova, Petra Kvitova and last year's winner Garbine Muguruza. That leaves Serena as the only remaining woman to have won the tournament. The seven-time champion came from a break down in the first set to get past Kristina Mladenovic , 2. Venus had rallied from a set down in her first two matches. Her exit means eight of the top 10 seeded women have gone out before the end of Week 1.
European Probe Survives Daring Dive Through Venus Atmosphere
Serena took her Wimbledon winning streak to 17 matches, thanks in part to 13 aces. She missed last year's tournament while pregnant. She faces another mother in the fourth round Monday: Keys also came up short with a comeback attempt after fighting back from a set and two breaks down, losing , ,
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