NASAのインスタグラム(nasagoddard) - 6月21日 01時18分

In many ways, Venus is the most similar planet to Earth. Not only are its size and gravity comparable to Earth’s, but there’s evidence that Venus once had lots of water – oceans’ worth! – in the distant past. So what happened?
New NASA-funded research using data from ESA’s Venus Express reveal that it may have been Venus’ electric field that stripped the planet of water. Venus’ electric field is about 5-10 times stronger than Earth’s. That electric force is enough to rip particles – including the building blocks of water – out of Venus’ atmosphere. Over time, this “electric wind” could leave a watery planet bone-dry, making it a key factor in whether or not a planet is hospitable to life. Understanding this process will help scientists pinpoint where potentially habitable planets could be lurking around other stars. [Transcript: So we went looking for Venus' electric field and, boy oh boy, did we find it. It turns out that Venus' electric field is at least five to ten times stronger than Earth's. It's a monster of a force. It can rip heavy things like oxygen straight out of the upper atmosphere and send them kicking and screaming off into space.] Credit: NASA’s Goddard Space Flight Center #nasagoddard #venus #water #earth #space #gravity

[BIHAKUEN]UVシールド(UVShield)

>> 飲む日焼け止め！「UVシールド」を購入する