The Andromeda galaxy is surrounded by a constellation of dwarf galaxies that are arranged in a highly lopsided manner.

Teleology is the idea that some processes in nature are directed toward a goal or an end. Today, it is commonly asserted that ...

An extremely bold hypothesis proposes transient temporal singularities remove the need for dark matter and dark energy.

About half of the non-dark matter in the universe cannot be accounted for by stars and galaxies alone. Now, scientists say ...

People are still puzzling over why nearby objects and distant galaxies move away from us at different speeds. There may now ...

Ostriker is responsible for groundbreaking discoveries that forever changed the way astronomers think about what the universe is made of, including the existence of dark matter.

Spiders, parchment, bone and complex math were among the methods ancient cultures used. What drives this need? Who are the soothsayers in our midst today?

In the grand puzzle of the cosmos, one question continues to defy easy answers: how fast is the universe expanding?

The detection of dark matter, the elusive type of matter predicted to make up most of the universe's mass, is a long-standing ...

In recent years, one of the most troubling puzzles in astrophysics has grown more urgent. Scientists have realized that the ...

Amartya Sengupta will study phenomena at the intersection of particle physics and cosmology at the University of Cincinnati.