solar wind

NASA’s Cassini, Voyager Missions Suggest New Picture of Sun’s Interaction with Galaxy

NASA’s Cassini, Voyager Missions Suggest New Picture of Sun’s Interaction with Galaxy

New data from NASA’s Cassini mission, combined with measurements from the two Voyager spacecraft and NASA’s Interstellar Boundary Explorer, or IBEX, suggests that our sun and planets are surrounded by a giant, rounded system of magnetic field from the sun — calling into question the alternate view of the solar magnetic fields trailing behind the sun in the shape of a long comet tail.

You are living inside a massive, musical instrument – and here’s what it sounds like

You are living inside a massive, musical instrument – and here’s what it sounds like

The ancients believed that the Earth was surrounded by celestial spheres, which produced divine music when they moved. We lived, so to speak, in a huge musical instrument. This may sound silly but modern science has proved them right to a certain extent. Satellites recording sound waves resonating with the Earth’s magnetosphere – the magnetic bubble that protects us from space radiation – show that we are indeed living inside a massive, magnetic musical instrument.

How did Mars lose its habitable climate? The answer is blowing in the solar wind

How did Mars lose its habitable climate? The answer is blowing in the solar wind

“Mars ain’t the kind of place to raise your kids – in fact it’s cold as hell,” sings Elton John in Rocket Man. And it’s true: the present atmosphere and surface of Mars are certainly inhospitable for any aspiring rocket man. Since Mars lost its magnetic field 3.8 billion years ago, the pressure of its once Earth-like atmosphere has gradually reduced to just 1% of Earth’s, letting through damaging UV light and cosmic radiation that make the surface a lot less habitable.