Cosmology
A New, More Accurate Measurement for the Clumpiness of the Universe
Cosmologists are wrestling with an interesting question: how much clumpiness does the Universe have? There are competing but not compatible…
Euclid Begins its 6-Year Survey of the Dark Universe
ESA's Euclid mission was launched in July 2023 and has already sent home test images showing that its instruments are…
How Does the Cosmic Web Drive Galaxy Evolution?
Galaxies experience a long strange trip through the cosmic web as they grow and evolve. It turns out that the…
Dust Ruins Another Way of Measuring Distance in the Universe
Astronomers are always searching for new ways to measure distance in the Universe, especially at the greatest distances where less…
The JWST Solves the Mystery of Ancient Light
The very early Universe was a dark place. It was packed with light-blocking hydrogen and not much else. Only when…
Astronomers Rule Out One Explanation for the Hubble Tension
Astronomers measure the Universe's expansion rate and have found a discrepancy between the speed nearby versus the speed measured in…
1,500 New Type 1A Supernova Found as Part of the Dark Energy Survey
Supernova explosions are fascinating because they're so cataclysmic, powerful, and awe-inspiring. They're Nature's summer blockbusters. Humans have recorded their existence…
Webb Sees a Supernova Go Off in a Gravitationally Lensed Galaxy – for the Second Time
Nature, in its infinite inventiveness, provides natural astronomical lenses that allow us to see objects beyond the normal reach of…
Why Was it Tricky to Know the Distances to Galaxies JWST Was Seeing?
One of the chief objectives of the James Webb Space Telescope (JWST) is to study the formation and evolution of…
If Our Part of the Universe is Less Dense, Would That Explain the Hubble Tension?
In the 1920s, Edwin Hubble and Georges Lemaitre made a startling discovery that forever changed our perception of the Universe.…