STEM Challenges

Galaxies did not appear fully formed — they grew slowly from tiny seeds in the early universe. Explore the story of how the first galaxies emerged, ho...

The universe contains hundreds of billions of galaxies, each a vast island of stars. Discover how astronomers classify these cosmic giants — from smoo...

Not all stars are the same age, and those differences reveal the entire history of our galaxy. Explore how stellar populations tell the story of the M...

The vast space between the stars may look empty, but it is filled with gas and dust that connects every star to every other. This interstellar medium ...

Hidden at the very heart of the Milky Way, behind curtains of gas and dust, lurks a supermassive black hole four million times more massive than the S...

We live inside a vast barred spiral galaxy containing hundreds of billions of stars. But because we are embedded inside it, mapping its true shape has...