8.3light-minutes
The Sun and its worlds
Our star and its weather, the planets, the rocks we watch, and the craft we sent out.
Right now in the solar system
Solar wind speed measured upstream of Earth
337 km/s
Measuredupdated 9 min ago
Planetary K-index (Kp), latest 3-hour value
4.33
Measured, with errorupdated 1 h ago
Time for light from Earth to reach Voyager 1
23 h 57 m 27 s
MeasuredLive · as of 31 Oct 2026