News

Europa’s flexing icy crust might make more heat than scientists thought

15 April 2016 Astronomy Now

As it orbits Jupiter, the icy surface of Europa heaves and falls with the changing pull of its parent planet’s gravity, creating enough heat to likely support a global ocean beneath the Jovian moon’s solid shell. Experiments by geoscientists suggest that this process, called tidal dissipation, could create far more heat in Europa’s ice than scientists had previously assumed.

Observing

See outermost planet Neptune at its best

29 August 2015 Ade Ashford

When Pluto was reclassified as a dwarf planet in 2006, Neptune regained the title of the solar system’s outermost planet. Since this fascinating gas giant reached opposition on 1 September in the constellation Aquarius, now is a great time to seek it out. We show you how to locate Neptune with binoculars and small telescopes.