Perimenopause Age. There is not a set age for perimenopause to start; however, most women report the first symptoms in their early 40s. Since that is only an average, beginning perimenopause at an older or younger age signifies nothing.here is not a set age for perimenopause to start; however, most women report the first symptoms in their early 40s. Since that is only an average, beginning perimenopause at an older or younger age signifies nothing.
The surface of Venus is covered by a dense atmosphere and presents clear evidence of former violent volcanic activity. It has shield and composite volcanoes similar to those found on Earth. Relative to the Moon, Mars or Mercury, Venus has few small impact craters.fter the Moon, Venus was the second object in the Solar System to be explored by radar from the Earth. The first studies were carried out in 1961 at NASA 's Goldstone Observatory, part of the Deep Space Network.
5. Snow on Venus? Venus Express discovered a surprisingly cold region high in the planet's atmosphere, where conditions may be frigid enough for carbon dioxide to freeze out as ice or snow. Although the planet's surface is like a red hot furnace, conditions are very different at an altitude of 125 km, where Venus Express revealed a very frigid layer with a temperature of around -175Â°C. The unexpected cold layer is far chillier than any part of Earth's atmosphere, despite Venus being much closer to the Sun. The discovery was made by studying light from the Sun as it passed through the atmosphere, revealing the concentration of carbon dioxide gas molecules at various altitudes along the terminator â the dividing line between the day and night sides of the planet.