Today the Cassini spacecraft is due to swoop over the south pole of Enceladus, one of the inner moons of Saturn, at a height of 50 km (30 miles), sampling its celebrated south polar plumes. The analyzers will “sniff and … Continue reading →

“[Those] who have an excessive faith in their theories or in their ideas are not only poorly disposed to make discoveries, but they also make very poor observations.” —Claude Bernard (1813-78) French physiologist, 1865. MESSENGER flew 200 kilometres above Mercury’s … Continue reading →