• Question: What is the Jupiter's X-ray aurorae?

    Asked by anon-205626 to adeliegorce, Affelia, Gabriel, Jose Angel, Kathryn, Russell on 12 Mar 2019.
    • Photo: Affelia Wibisono

      Affelia Wibisono answered on 12 Mar 2019:


      Most of the planets in our Solar System have aurorae – also known as the northern and southern lights. These are made when charged particles from the Sun interact with the gases in a planet’s atmosphere and make them glow. Different gases glow different colours.

      The green is given off by oxygen that is about 100km – 240km above the surface. Red is from oxygen that is higher up in the atmosphere. Nitrogen gives the lights a purple-blue colour.
      We can only see them near the north and south poles, and not near the equator, because the Earth has an invisible shield that protects us from the charged particles from the Sun. The Earth is like a giant magnet and has a magnetic field like this magnet. This is the Earth’s “shield”.

      The charged particles from the Sun (the solar wind is a steam of these charged particles) follow the lines of the Earth’s magnetic field and the only way through is at the auroral ovals, and so they can only interact with the atmosphere at these places.

      Jupiter’s magnetic field is much stronger than the Earth’s. As the particles in the solar wind travel along the magnetic field lines, they are accelerated, getting faster and faster, and release X-rays. What makes it more complicated is that Jupiter has a moon called Io that has hundreds of volcanoes. The material released by these volcanoes can also interact with Jupiter’s atmosphere and what I’m trying to find out is if it’s the Sun or Io’s volcanoes that produce most of Jupiter’s X-ray lights.

      This is a picture of what Jupiter’s X-ray northern and southern lights would look like if our eyes can see them.

    • Photo: Kathryn Boast

      Kathryn Boast answered on 12 Mar 2019:


      Affelia’s answer is great. Wouldn’t it be amazing to see Jupiter’s x-ray aurorae!! Did you know the Earth has x-ray aurorae too? This is an image of them from the European Space Agency:

      X-ray view of Earth’s aurora

    • Photo: Gabriel Gallardo

      Gabriel Gallardo answered on 12 Mar 2019:


      Don’t think I could answer any better than Affelia and Kathryn. Check their answers out!

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