A hundred years ago, astronomer Edwin Hubble dramatically expanded the size of the known universe. At a meeting of the ...

Redshift occurs because older stars end up farther away as the universe continues to expand. Red is also the longest wavelength in the visible light spectrum, so faraway stars look redder since ...

That star existed when the universe was about 4 billion years old, or 30 percent of its current age, at a time astronomers refer to as a “1.5 redshift”. Scientists use the term “redshift ...

And second, because red is the longest wavelength in the visible spectrum of light, stars that are very far away tend to appear redder, having a higher redshift. JWST is designed to peer deeply ...

The recent detection of a cosmic explosion by the Einstein Probe is stirring excitement among space watchers everywhere.

Mysterious little red dots threatened to overhaul modern cosmology—but new research may have solved the celestial conundrum.

This indicated the stars were moving away from Earth (just ... this phenomenon was termed 'redshift'. Figure caption, Lower diagram shows spectrum of light redshifted from a distant galaxy moving ...

which suggests an onset of quenching of star-formation. The astronomers suppose that these galaxies would become about two times more massive and would enter a quiescent phase at a redshift of ...

Astronomers see red shift in virtually all galaxies. It is a result of the space between the Earth and the galaxies expanding. This expansion stretches out the light waves during their journey to ...

I work on theories of galaxy formation, reionization, first stars, primordial metal production, and numerical hydrodynamical simulations of high-redshift galaxies and the multi-phase intergalactic ...