Artistic rendering of the Square Kilometre Array at night. SKA Organisation
By Yves Wiaux, Heriot Watt University and Jason McEwen, University College London
"Dark matter" is a blanket term for inferred matter that is undetected but must exist in order for gravity at very large scales to make any sense at all.
Based on inference, 27 percent of the universe is generally acknowledged to be dark matter, even though it is not visible and eludes direct detection and measurement. Whatever dark energy might turn out to be gets a number of about 68 percent of the universe. The rest of the universe, what we can detect and feel, is what we know to be matter.
Hang on? Oh, there you are… ESA, Author provided
By Monica Grady, The Open University
Phew, what a day it was yesterday. Ended up having a quiet drink at the hotel. Last drink of the day – a nice cup of tea!
Most of the world that has access to the Internet knows two things about the Rosetta mission - it landed on a comet and a European engineer wore an ugly shirt that offended a lot of American women on Twitter.
The least interesting news is that the ESA now knows that if women can't wear bathing suits to represent them on television, then male project scientists cannot wear bowling shirts and shorts. The important news, however, is that mankind has shown we can go on a 10 year, 4 billion mile journey through the solar system and land on a rock the size of Cork City, Ireland.