Venus Express has detected oxygen, hydrogen and helium ions-remnants of early oceans-escaping into space.
The SWEAP solar wind experiment will count the electrons, protons and helium ions in the solar wind and measure their properties.
Venus Express has detected oxygen, hydrogen and helium ions-remnants of early oceans-escaping into space.
The SWEAP solar wind experiment will count the electrons, protons and helium ions in the solar wind and measure their properties.