Dark Matter and Dark Energy: The Hidden 95% of the Universe by Brian Clegg

• Dark Matter and Dark Energy: The Hidden 95% of the Universe
• Brian Clegg
• Page: 176
• Format: pdf, ePub, mobi, fb2
• ISBN: 9781785785504
• Publisher: Icon Books, Ltd. UK

Download eBook

Download pdf online books Dark Matter and Dark Energy: The Hidden 95% of the Universe by Brian Clegg 9781785785504 in English

Overview

All the matter and light we can see in the universe makes up a trivial 5 per cent of everything. The rest is hidden. Since the 1970s, astronomers have been aware that galaxies have far too little matter in them to account for the way they spin around: they should fly apart like clay off a potter’s wheel, but something concealed holds them together. This ‘something’ is dark matter - invisible material in five times the quantity of the familiar stuff of stars and planets. By the 1990s we also knew that the expansion of the universe was accelerating. Something, named dark energy, was pushing it to expand faster and faster. Across the universe, this requires enough energy that the equivalent mass would be nearly 14 times greater than all the known material in existence. With dark matter and dark energy making up 95 per cent of reality, cosmologists have uncovered the biggest puzzle that science has ever faced.

Links: Free download of textbooks The Michel Henry Reader 9780810140677 read pdf, Google books ebooks free download White Fire English version DJVU 9781621052777 by Brian Keene site, Descarga de audiolibros gratis QUAN ARRIBA LA PENOMBRA DJVU 9788417420390 (Spanish Edition) de JAUME CABRE I FABRE here, Epub free book downloads The Marriage Merger 9781476744919 MOBI PDF by Jennifer Probst read book,