Observing the night sky is like looking through a time machine; every image comes from a different past — a kaleidoscope of times — each telling a different story, says astrophysicist Marcelo Gleiser.
Observing the night sky is like looking through a time machine; every image comes from a different past — a kaleidoscope of times — each telling a different story, says astrophysicist Marcelo Gleiser.