space weather.

Variable conditions in space, especially particle and electromagnetic activity that can affect spacecraft and technological systems.

Use it for

Words that belong together

• severe space weather
• space-weather forecast

On the page

The space-weather forecast delayed the ascent by six hours.

Severe space weather left the relay satellites operating in safe mode.

Usage notes

Primary category: sci-fi. Forms: Usually uncountable. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.