Vera Rubin

Hello, my name is Vera Rubin, and I spent my life looking at the stars. It all started when I was a young girl. I was born on July 23rd, 1928, and I grew up in Washington, D.C. From my bedroom window, the night sky looked like a giant blanket of sparkling jewels, and I wanted to know everything about it. I watched the stars move across the sky and wondered what they were made of. My father saw how curious I was and helped me build my very first telescope. It wasn't a fancy one; we made it out of a cardboard tube. But through its lens, I saw the planets and stars more clearly than ever before. That simple telescope opened up a whole new world for me. I felt like an explorer, and the universe was the amazing place I wanted to discover.

When I grew up, I knew exactly what I wanted to be: an astronomer. An astronomer is a scientist who studies stars, planets, and everything else in space. I went to a school called Vassar College and graduated in 1948 with a lot of knowledge about the universe. Back then, it was a little harder for women to become scientists. Some of the big schools I wanted to go to didn't let women study astronomy. But I was not going to let that stop my dream. I said to myself, 'I will find another way.' And I did. I found other wonderful universities, like Cornell and Georgetown, that welcomed me. I kept learning and working hard to become the scientist I always wanted to be.

My favorite work was using giant, powerful telescopes to look at galaxies. Galaxies are huge families of stars, all swirling together far, far away in space. During the 1970s, I spent many nights pointing these big telescopes at the sky and studying how galaxies spin. I noticed something very strange and exciting. The stars on the very edge of the galaxies were moving just as fast as the stars in the center. This was a huge surprise. Think of it like a merry-go-round. If it spins really fast, the horses on the outside should fly off. But the stars in these galaxies weren't flying off. They were staying right in place. I realized there had to be something else there, something I couldn't see, that was holding everything together. Its gravity was like a super strong glue. Scientists now call this mysterious, invisible stuff 'dark matter.' It was a clue that the universe was even more amazing and mysterious than we had ever imagined.

I lived to be 88 years old, and my life was full of wonder. My discoveries about dark matter helped scientists see the universe in a completely new way, showing them that much of it is invisible. I always loved encouraging young people, especially girls, to study science and ask big questions. Today, astronomers continue to explore the mysteries I helped uncover. A giant new observatory was even named after me to carry on this important work. I hope my story inspires you to look up at the night sky and wonder what secrets are waiting for you to find.