"Astronomers will always assume a simple model unless there is overwhelming evidence that this simple model is flawed." ...

According to astrophysicists, the Universe will evolve over time into a homogeneous soup where nothing ever happens.

But from where Earth sits in the observable universe, our view extends more than 13 billion years into the past. Far outside our Local Group, astronomers have found galaxies so metal-poor and so ...

dark matter and dark energy account for the vast majority of the mass in the observable universe. The observed phenomena which imply the presence of dark matter include the rotational speeds of ...

It is absolute. The expansion of space has stretched the wavelengths of Cosmic Microwave Background photons past the size of the observable universe. They wash over the telescopes on that ...

Astronomers setting their sights halfway across the observable universe recently identified the largest amount of individual stars ever detected so far away – a feat once considered near-impossible.

What is the universe expanding into if it’s already infinite? The universe expands by itself, not into any external space, with galaxies continuously moving away from the Milky Way. Initiated by the ...

Planet Earth and its unusually large moon.