A Mars-sized exoplanet

by Gregory Laughlin from Nature 522, 290–291 (18 June 2015) doi:10.1038/522290a Analysis of Kepler data has yielded the smallest known mass for an exoplanet orbiting a normal star. Its mass […]

The slow death of red galaxies

by Andrea Cattaneo from Nature 521, 164–165 (14 May 2015) doi:10.1038/521164a For most galaxies, the shutdown of star formation was a slow process that took 4 billion years. An analysis […]

Many flavours of supernova

from Nature 520, 411 (23 April 2015) doi:10.1038/520411d Exploding stars grouped in one family because of their similarities actually form two distinct groups. This may have important cosmic implications because […]

Inge Lehmann

by Bruce A. Bolt from Physics Today, 1994 Inge Lehmann died in Copenhagen on 21 February 1993, three months short of age 105. Born in 0sterbro, Denmark, Lehmann graduated in […]

Hubble’s hits and beyond

from Hubble’s legacy by Mario Livio In-flight servicing has prolonged the space telescope’s life, paving the way for future missions. 1990 The Hubble Space Telescope is launched on the space […]