NASA's Heliophysics division sees the importance of space weather and pursues the research that strives to predict it more accurately.
    1. What is space weather?

      Space weather is the environmental conditions outside our planet's atmosphere.

    2. Space weather is largely a result of the solar wind. How fast does the solar wind travel?

      The solar wind speeds through space at up to a million miles an hour.

    3. How often does the solar wind blow toward Earth?

      Earth's magnetosphere is constantly bombarded by the solar wind.

    4. What are some of the impacts of space weather on Earth?

      Power outages, disruption of spacecraft, and radiation that can harm astronauts are some of the effects of space weather.

  • Term Part of Speech Definition Encyclopedic Entry
    astronaut Noun

    person who takes part in space flights.

    atmosphere Noun

    layers of gases surrounding a planet or other celestial body.

    Encyclopedic Entry: atmosphere
    magnetosphere Noun

    teardrop-shaped area, with the flat area facing the sun, around the Earth controlled by the Earth's magnetic field.

    power outage Noun

    loss of electricity.

    radiation Noun

    energy, emitted as waves or particles, radiating outward from a source.

    solar wind Noun

    flow of charged particles, mainly protons and electrons, from the sun to the edge of the solar system.

    spacecraft Noun

    vehicle designed for travel outside Earth's atmosphere.

    space weather Noun

    changes in the environment outside the Earth's atmosphere, usually influenced by the sun.