For more than a century, astronomers have been measuring how quickly the universe is flying apart, quietly assuming that with better telescopes and cleaner data, all the numbers would eventually agree. Instead, the opposite is happening. New observations, from ultra-precise space telescopes to clever uses of exploding stars and gravitational waves, are sharpening a ...
The cosmic microwave background represents the earliest visible light in our universe, a fading echo from when the cosmos was just a child. For decades, scientists viewed this ancient radiation as a stable cosmic record. Yet recent observations are revealing something startling: this primordial light in ways we never expected. Picture the universe as it ...
For most of human history, the night sky has been a place where stars, planets, and faraway galaxies can be seen. But what was there before the first stars came to life? Was the universe full of light when it was young, or was it a dark void? The answer is much more interesting than ...
Astronomers have been trying to fit the cosmic puzzle of how the universe changed from a dark, featureless void into a glittering expanse of stars and galaxies for decades. Now, a faint whisper from the dawn of time, a radio signal emitted just 100 million years after the Big Bang has given scientists an unheard-of ...
A cosmic leviathan stirs across the great, quiet expanse of the early universe. About 12 billion years old, a supermassive black hole has unleashed a jet of energy so strong it defies understanding illuminated not by starlight but by the fading echo of the Big Bang itself. Three times the width of our Milky Way, ...
Cosmologists have believed for a long time that dark energy the mysterious factor that accelerates the expansion of the universe–was a constant, indestructible presence. However, the latest information obtained from the Dark Energy Spectroscopic Instrument (DESI) indicates this is not the situation. Instead, the impact of dark energy may diminish as time passes, a finding ...
