Tag: dark energy
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Cosmic Cooling: Euclid Confirms Star Formation Has Peaked, Universe Heads for a Cold Decline
Introduction: A Milestone in Mapping the Cosmos The Euclid space telescope, launched to chart the largest-ever map of galaxies and dark matter, has delivered a sobering verdict: star formation in the universe appears to have peaked and is now on a slow, irreversible decline. This finding, drawn from a vast catalog of observations, aligns with…
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Remarkable study challenges the idea of an accelerating universe using Type Ia supernovae
Unraveling the cosmos: a fresh look at expansion For decades, astronomers have relied on Type Ia supernovae as bright, dependable beacons to map the expansion of the universe. These stellar explosions serve as cosmic standard candles, allowing scientists to measure how fast galaxies are moving away from us. A cornerstone of modern cosmology has been…
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Remarkable study finds no evidence of an accelerating universe
Rethinking the Expansion: A Fresh Look at Type Ia Supernovae For decades, astronomers have relied on Type Ia supernovae as cosmic mileposts to measure the universe’s expansion. These stellar explosions, occurring in binary systems where a white dwarf accretes matter from a companion star, shine with remarkable regularity. That consistency makes them excellent standard candles:…
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No Evidence of an Accelerating Universe: What a New Supernova Study Reveals
New findings challenge the standard view of cosmic acceleration In the ongoing quest to understand the expansion of our universe, astronomers have long relied on the light from Type Ia supernovae as cosmic mile markers. These stellar explosions act like standard candles, providing reliable distance measurements that help map how the universe has grown over…
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Dimmer Supernovae May Rewrite Our Universe’s Expansion
New Theory Challenges a Cornerstone of Cosmology A provocative new study from Yonsei University in South Korea asks a deceptively simple question: what if some supernovae are naturally dimmer than others? The team’s hypothesis is that the brightness of certain Type Ia supernovae—the standard candles astronomers rely on to measure cosmic distances—depends on the age…
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Physicists Map a Possible End: The Universe’s Reverse Big Bang in 33.3 Billion Years
Intro: A Possible Final Chapter for the Cosmos Physicists have outlined a provocative scenario in which the Universe could eventually stop expanding and reverse, contracting toward a final Big Crunch. The model, which blends evolving dark energy with a light axion field, estimates a lifespan of about 33.3 billion years for the cosmos. With the…
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Funnel Diagram of the Big Bang: Why Scientists Use It
Not a Shape, But a Timeline The familiar funnel-shaped diagram used to illustrate the Big Bang is not meant to imply that the universe itself is cone-like. In science communication, the funnel is a timeline. It shows how the universe has grown, slowed, and then accelerated its expansion over 13.8 billion years. The narrow tip…
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Why Scientists Use a Funnel to Illustrate the Big Bang
Not a Shape: The Funnel as a Timeline When scientists depict the Big Bang with a funnel, they aren’t claiming the universe looks like a cone. The funnel is a tool to visualize a timeline, showing how the cosmos has stretched, cooled, and accelerated across 13.8 billion years. The narrow end marks the universe’s earliest…
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Flagship 2 Unveiled: The Largest Universe Simulation With 3.4B Galaxies
Flagship 2: A Grand Step in Cosmology Researchers have unveiled Flagship 2, the largest universe simulation to date, charting the fates of 3.4 billion galaxies. Built to refine the analysis of data from the Euclid space telescope, the mock universe serves as a critical test bed for interpreting observations once Euclid’s survey data start arriving…
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Flagship 2 Unveiled: The Largest Universe Simulation with 3.4 Billion Galaxies
Flagship 2: The largest universe simulation to date Flagship 2 stands as the largest and most ambitious universe simulation, tallying about 3.4 billion galaxies to test what we know about cosmic history. Built to mirror the standard cosmological model, it mirrors the known mix of matter, dark matter and dark energy and to forecast what…