Universe Today
Universe Today
Universe Today - http://universetoday.com, a website about space and astronomy. Tweets are probably coming from @fcain.Source
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Earth's Atmosphere Is Retaining Heat Twice as Fast as It Did Just 15 Years Ago

Earth's Atmosphere Is Retaining Heat Twice as Fast as It Did Just 15 Years Ago

These days it seems you can't walk through a bookstore without bumping into a book or magazine pointing out the negative consequences of climate change. Everything from the hottest years on record to ruining astronomy can be tied to climate change. Now some new science lays another potential problem at climate change's feet – Earth is retaining more than twice as much heat annually as it was 15 years ago. A team from NASA and NOAA found that Earth's "energy imbalance" doubled between 2005 and 2019. The energy imbalance is simple to understand but complex in its causes and impacts. It is...

Jul 12
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Neutrinos Prove Our Sun Is Undergoing a Second Type of Fusion in Its Core

Neutrinos Prove Our Sun Is Undergoing a Second Type of Fusion in Its Core

Like all stars, our Sun is powered by the fusion of hydrogen into heavier elements. Nuclear fusion is not only what makes stars shine, it is also a primary source of the chemical elements that make the world around us. Much of our understanding of stellar fusion comes from theoretical models of atomic nuclei, but for our closest star, we also have another source: created in the Sun's core.Whenever atomic nuclei undergo fusion, they produce not only high energy gamma rays but also neutrinos. While the gamma rays heat the Sun's interior over thousands of years, neutrinos zip out of the Sun at...

December 1, 2020
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The Milky Way's Oldest Stars Are Moving in Unexpected Ways

The Milky Way's Oldest Stars Are Moving in Unexpected Ways

Some of the Milky Way's oldest stars aren't where we expect them to be.One of the ways we categorize stars is by their metallicity. That is the fraction of heavier elements a star has compared to hydrogen and helium. It's a useful metric because the metallicity of a star is a good measure of its age. The hydrogen and helium we see in the Universe were created in the early moments of the . That's why they are so plentiful. Heavier elements such as carbon and iron are created through astrophysical processes such as the fusion of elements in stellar cores, or during the collisions of white...

November 21, 2020
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Astronomers Report That Venus' Atmosphere Contains an Amino Acid Found in DNA

Astronomers Report That Venus' Atmosphere Contains an Amino Acid Found in DNA

Does it feel like all eyes are on these days? The discovery of the potential biomarker phosphine in the planet's upper atmosphere last month garnered a lot of attention, as it should. There's still some uncertainty around what the phosphine discovery means, though. Now a team of researchers claims they've discovered the amino acid glycine in Venus' atmosphere.The paper announcing the finding is titled ''. The lead author is Arijit Manna, a Ph.D. Research Scholar in the Dept. of Physics at Midnapore College in West Bengal, India. The paper is at the pre-print site arxiv.org, which means it...

October 17, 2020
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We Now Have Proof a Supernova Exploded Perilously Close to Earth 2.5 Million Years Ago

We Now Have Proof a Supernova Exploded Perilously Close to Earth 2.5 Million Years Ago

In its 4.5 billion year history, Earth has had to run the gauntlet. Numerous catastrophes have imperilled the planet, from massive impacts, to volcanic conflagrations, to frigid episodes of snowball Earth. Yet life persists. Among all of the hazards that threaten a planet, the most potentially calamitous might be a nearby star exploding as a supernova. When a massive enough star reaches the end of its life, it explodes as a supernova (SN). The hyper-energetic explosion can light up the sky for months, turning night into day for any planets close enough. If a planet is too close, it will...

October 6, 2020
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