How many moons?

Space Science Image of the Week Competition 2012 winner:

What: The conjunction of Jupiter and its four large satellites with Earth’s Moon.

How: Canon 40D DSLR camera, 66 mm Baader Scopos telescope with F= 450 mm, plus processing to emphasise Jupiter’s moons. Two exposures were taken with just a few seconds delay to best capture the details of both the bright Moon and faint moons of Jupiter.

When: 2 November 2012

Where: Madrid, Spain

Who: Antonio Peña

What our judges said: “It is inspiring to present in one frame, a giant planet – 318 times the mass of Earth – and five moons, including our own, given the hundreds of millions of kilometres that separate Earth and Jupiter.”