Convincing a Young Scientist that Dark Matter Exists

“The Universe is made mostly of dark matter and dark energy, and we don’t know what either of them is.” –Saul Perlmutter When I was starting out as a graduate student, one of the most exciting (and daunting) tasks facing me was to piece together a scientifically accurate and useful picture of the Universe, including … Read moreConvincing a Young Scientist that Dark Matter Exists

What’s going to happen when the Earth passes through the Galactic Plane?

“It isn’t necessary to imagine the world ending in fire or ice — there are two other possibilities: one is paperwork, and the other is nostalgia.” –Frank Zappa There are many websites around telling you that the world is going to end on the winter solstice — December 21st — in the year 2012. And … Read moreWhat’s going to happen when the Earth passes through the Galactic Plane?