In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small ...

Edwin Powell Hubble is renowned for determining ... man explores the universe around him and calls the adventure Science." ...

Edwin Lyman is an internationally recognized expert on nuclear proliferation and nuclear ... Since joining UCS in 2003, he has published articles in a number of journals and magazines, including ...

Carnegie Science and NASA are celebrating this centennial ... pushes the frontiers of knowledge over 10 times farther than Edwin Hubble could ever see. The space telescope has lifted the curtain ...

A century ago, Edwin Hubble determined that the Andromeda nebula was nearly a million light years away, proving it was not part of the Milky Way and confirming the existence of other galaxies.