Telescopes and space missions Video In search of gravitational waves Using pulsar signals to search for these elusive waves Read article: In search of gravitational waves
Gravity Feature Hunting gravitational waves using pulsars Louise Mayor reports on the search for these ripples in space–time Read article: Hunting gravitational waves using pulsars
Telescopes and space missions Research update BICEP2 gravitational wave result bites the dust thanks to new Planck data Planck and BICEP2 to carry out a joint analysis of data for definitive answer Read article: BICEP2 gravitational wave result bites the dust thanks to new Planck data
Telescopes and space missions Research update Divergent quasars fall in line Diverse properties of cosmic behemoths based on only two parameters Read article: Divergent quasars fall in line
Telescopes and space missions Opinion and reviews Web life: Super Planet Crash A simple game based on orbital dynamics is a "gateway drug" for learning more about exoplanet science Read article: Web life: Super Planet Crash
Telescopes and space missions Research update Nearby galaxy harbours rarest type of black hole M82's black hole is 400 times the Sun's mass Read article: Nearby galaxy harbours rarest type of black hole
History Opinion and reviews A century of general relativity An intellectual history of Einstein's general theory of relativity, reviewed by Cormac O'Raifeartaigh Read article: A century of general relativity
Gravity Feature Theories of the dark side Jeff Forshaw reviews "state of play" for various theories about the nature of dark matter and dark energy Read article: Theories of the dark side
Telescopes and space missions Research update Couple emerges from trio of supermassive black holes Tightly orbiting pair could create detectable gravitational waves Read article: Couple emerges from trio of supermassive black holes
Telescopes and space missions Research update Dwarf planet could illuminate the dark sector How to test antigravity using Kuiper belt objects Read article: Dwarf planet could illuminate the dark sector