As a PhD student at Cambridge, she was integral to the discovery of pulsars, which won her advisor the Nobel Prize. If you've worked in academia, you know that it can be hard for a grad student to get the credit they deserve, and perhaps being a woman in the day (and even now) was a factor.
And I know science doesn't get our respect like it once did, but wow she has done so much for astronomy. Aside from not being mentioned by the Nobel committee, she's won every other honor conceivable. This is only the 4th Breakthrough Prize ever awarded. She's going to dedicate all the monies to scholarships and pass on buying a Ferrari. Did I mention my crush?
Great article about her in The Washington Post.