Watch as NASA holds a news conference to discuss the Juno mission and the probe’s planned 4 July arrival at Jupiter. The spacecraft will be the first to visit the gas giant in almost a decade.

Researchers at MIT, the University of Colorado and elsewhere have found that very low-frequency electromagnetic waves in the Earth’s upper atmosphere form a shield, protecting the planet’s surface from the Van Allen belt’s high-energy radiation.

Since its discovery in 1801, Ceres was known as a planet, then an asteroid and later a dwarf planet. Now, after a journey of 3.1 billion miles (4.9 billion kilometres) and 7.5 years, NASA/s Dawn spacecraft calls Ceres home.