A solar storm has just blasted off from the Sun. Ray is racing through the heliosphere to reach Earth first
and warn everyone about the incoming space weather. Answer questions to help Ray stay ahead of the storm,
hop from region to region, and make it safely down to ground level.
Race from Sun to Ground
Each circle is a step through the heliosphere, from the solar surface to Earth's atmosphere and ground.
Correct answers push Ray forward. Wrong answers let the storm surge closer.
Ray's pathStart at the Sun
Ray is currently in:
Solar surface
The Sun’s visible “surface”, where sunspots and flares begin.
Solar stormStill near the Sun
Storm location:
Solar surface
The storm has just launched from the same active region on the Sun.
Ray (your token)
Solar storm chasing you
Answer the question
Tap an answer below. If you're right, Ray rides the solar wind closer to Earth.
If you're wrong, the solar storm catches up instead. Reach ground level before the storm to win.
Loading question…
You don’t need equations here — just the big ideas. Replay to see new questions each time.