Triple star system involving a pulsar suggests Einstein was right. Kevin Gill/Flickr, CC BY-ND

Free-falling dead stars show that a cornerstone of physics holds up

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Hawking had a cult-like following among academics and non-academics alike. kosalabandara/flickr, CC BY

Hawking tackled the biggest question of all: how did the universe begin?

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Image showing where scientists believe dark matter resides in the galaxy cluster Abell 520 – near the hot gas in the middle, coloured green. Chandra X-ray Observatory Center, CC BY-SA

Study finds ‘dark matter’ and ‘dark energy’ may not exist – here’s what to make of it

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Simulated universe: EAGLE collaboration, J Schaye et al 2015. MNRAS, CC BY-SA

Can we ditch dark energy by better understanding general relativity?

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Gravity of a white dwarf star warps space and bends the light of a distant star behind it. NASA, ESA, and A. Feild (STScI

How we managed what Einstein thought was impossible – and used his theory to weigh a star

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Artist’s conception of two merging black holes, spinning in a nonaligned fashion. LIGO/Caltech/MIT/Sonoma State (Aurore Simonnet), CC BY-ND

LIGO detects more gravitational waves, from even more ancient and distant black hole collisions

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