Juno 打破helio 2的記錄了
from:
http://www.space.com/33336-nasa-juno-probe-jupiter-orbit-tonight.html?utm_source=facebook&utm_medium=facebook&utm_campaign=socialfbspc&cmpid=social_spc_514630As Juno nears Jupiter tonight, the giant planet's powerful gravity will accelerate the spacecraft to an estimated top speed of about 165,000 mph (265,000 km/h) relative to Earth, mission team members said.
"I don't think we've had any human[-made] object that's moved that fast, that's left the Earth," Juno principal investigator Scott Bolton, of the Southwest Research Institute in San Antonio, said during a news conference last week.
The all-time speed record is currently held by NASA's Helios 1 and Helios 2 spacecraft, which launched in the mid-1970s to study the sun. Both probes reached top speeds of about 157,000 mph (253,000 km/h) at their points of closest approach to Earth's star.
Helios 2最靠近太陽時 相對速度25萬3000 公里/小時
JUNO 最靠近木星時 相對速度26萬5000公里 /小時
以前的討論
http://familystar.org.tw/index.php?option=com_smf&Itemid=45&topic=24607.msg216419#msg216419