Hold the front pages – there is apparently an obesity epidemic in the universe. Newly discovered galaxies are weighing much more than expected. A government spokesman puts the epidemic down to over-consumption of a type of fast food known as “dark energy burgers”.

Well, not exactly, but the jauntily named 2XMM J083026+524133 is one heck of a beast, weighing in at around the size of a thousand large galaxies. And apparently dark energy is the only cosmological theory that can explain its existence. More details here.