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Category: Astronomy/cosmology

How to see the cosmic web here on Earth

How to see the cosmic web here on Earth

Mark Neyrinck writes: The most familiar celestial objects, like Earth, the Moon and the Sun, are spheres. The solar system’s planets have orbits that are roughly circular, and zooming out a hundred-millionfold, the Milky Way is a flattened disk. But zooming out by a further factor of 1,000 from the Milky Way, to encompass our nearest non-satellite galaxy Andromeda, and dozens of others, the shapes look different. The arrangement may look haphazard, but it’s ordered in its own way, in…

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This star offers the earliest glimpse at the birth of a planetary system like ours

This star offers the earliest glimpse at the birth of a planetary system like ours

Science News reports: The birth of a new solar system may have been caught on camera. About 1,400 light-years from Earth sits a young sunlike star surrounded by cooling gas and teensy silicate minerals. These mineral solids — some of the building blocks of rocky planets — are among the first to condense from the gas, suggesting that they’re kick-starting the creation of planets in a system much like the one earthlings call home, researchers report in the July 17…

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Nearly half of the universe’s ordinary matter was uncharted, until now

Nearly half of the universe’s ordinary matter was uncharted, until now

Science News reports: Nearly half of the universe’s ordinary matter has been hiding — until now. Bursts of radio waves have illuminated the whereabouts of all ordinary matter, revealing its distribution between, around and within galaxies, researchers report June 16 in Nature Astronomy. And X-rays have uncovered details about a once hidden string of gas linking four galaxy clusters, another team reports in the June Astronomy and Astrophysics. “The two papers are very complementary,” says astrophysicist Jason Hessels of McGill…

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First images from Vera C. Rubin Observatory show 10 million galaxies

First images from Vera C. Rubin Observatory show 10 million galaxies

  Live Science reports: After decades of preparation, the Vera C. Rubin Observatory released its first images to the world in a live stream on Monday (June 23). The photos, taken by the world’s largest digital camera, are highly-detailed and show relatively large areas of the sky. In a televised news conference, scientists from the observatory revealed new details about the images that far surpass the “sneak peek” images released earlier in the day. In fact, an awe-inspiring spiral galaxy…

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James Webb telescope unveils largest-ever map of the universe, spanning over 13 billion years

James Webb telescope unveils largest-ever map of the universe, spanning over 13 billion years

Live Science reports: Scientists have unveiled the largest map of the universe ever created. Stretching across a tiny sliver of space and almost all cosmic time, it includes almost 800,000 galaxies imaged across the universe. Some are so far away that they appear as they existed in the infant universe, about 13 billion years ago. The map, released Thursday (June 5) by scientists at the Cosmic Evolution Survey collaboration , covers a 0.54-degree-squared arc of the sky, or about three…

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What blew up the Local Bubble?

What blew up the Local Bubble?

Paul Sutter writes: In our neighborhood of the Milky Way, we see a region surrounding the solar system that is far less dense than average. But that space, that cavity, is a very irregular, elongated shape. What little material is left inside of this cavity is insanely hot, as it has a temperature of around a million Kelvin. What’s going on? We call this region surrounding the solar system the Local Bubble, which is a bit unimaginative, but it gets…

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Distant planet might be brimming with life, astronomers suggest

Distant planet might be brimming with life, astronomers suggest

The New York Times reports: The search for life beyond Earth has led scientists to explore many suggestive mysteries, from plumes of methane on Mars to clouds of phosphine gas on Venus. But as far as we can tell, Earth’s inhabitants remain alone in the cosmos. Now a team of researchers is offering what it contends is the strongest indication yet of extraterrestrial life, not in our solar system but on a massive planet, known as K2-18b, that orbits a…

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Bennu asteroid reveals its contents to scientists − and clues to how the building blocks of life on Earth may have been seeded

Bennu asteroid reveals its contents to scientists − and clues to how the building blocks of life on Earth may have been seeded

This photo of asteroid Bennu is composed of 12 Polycam images collected on Dec. 2, 2024, by the OSIRIS-REx spacecraft. NASA By Timothy J McCoy, Smithsonian Institution and Sara Russell, Natural History Museum A bright fireball streaked across the sky above mountains, glaciers and spruce forest near the town of Revelstoke in British Columbia, Canada, on the evening of March 31, 1965. Fragments of this meteorite, discovered by beaver trappers, fell over a lake. A layer of ice saved them…

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Extraterrestrial life may look nothing like life on Earth − so astrobiologists are coming up with a framework to study how complex systems evolve

Extraterrestrial life may look nothing like life on Earth − so astrobiologists are coming up with a framework to study how complex systems evolve

Evolution, the process of change, governs life on Earth − and potentially different forms of life in other places. Just_Super/E+ via Getty Images By Chris Impey, University of Arizona We have only one example of biology forming in the universe – life on Earth. But what if life can form in other ways? How do you look for alien life when you don’t know what alien life might look like? These questions are preoccupying astrobiologists, who are scientists who look…

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The cosmos teems with complex organic molecules

The cosmos teems with complex organic molecules

Elise Cutts writes: Ten years ago, the European Space Agency’s Rosetta probe pulled up alongside a dusty, icy lump the size of a mountain. The probe would follow its quarry, a comet called 67P/Churyumov-Gerasimenko, for two years as onboard instruments caught and analyzed the dust and gas streaming away from the comet. Scientists sought hints about how our solar system came to be — and about the origin of one class of molecules in particular. Organic molecules — compounds containing…

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Stunning images from Jupiter created out of latest NASA Juno spacecraft flyby

Stunning images from Jupiter created out of latest NASA Juno spacecraft flyby

my god.https://t.co/jTnhJ3O2jU pic.twitter.com/egWqXk9JS5 — remnynt (@remnynt) November 6, 2024 CNET reports: Since NASA’s Juno spacecraft entered Jupiter’s orbit in July 2016 and began transmitting image data, the world has gotten glimpses of the solar system’s largest planet and its moons. But a new batch of images that have been contributed by spacewatchers using data from the mission are stunning, even by these standards. The most recent perijove, or the point when it’s closest to the planet, occurred for Juno on…

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The ‘beautiful confusion’ of the first billion years comes into view

The ‘beautiful confusion’ of the first billion years comes into view

Rebecca Boyle writes: The galaxies were never supposed to be so bright. They were never supposed to be so big. And yet there they are — oddly large, luminous objects that keep appearing in images taken by the James Webb Space Telescope (JWST). Kevin Hainline is part of a team that uses the JWST to find these galaxies, whose brightness, apparent mass, and sheer existence a virtual eyeblink after the Big Bang are among the biggest surprises from the three-year-old…

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How dark is the night sky?

How dark is the night sky?

Phil Plait writes: How dark is dark? When you go outside on a clear, moonless night, you can see not only lots of stars but also the black space between them—literally space, in this case. Given that you can see stars and that the sky is black, you might think the sky is transparent. But it’s not—at least, not really. Various molecules, atoms and particulates float around in the air, and these reflect light. During the day, sunlight entering the…

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Why energy-hungry civilizations on this planet and elsewhere are destined to self-destruct

Why energy-hungry civilizations on this planet and elsewhere are destined to self-destruct

Universe Today reports: Earth’s average global temperatures have been steadily increasing since the Industrial Revolution. According to the National Oceanic and Atmospheric Agency (NOAA), Earth has been heating up at a rate of 0.06 °C (0.11 °F) per decade since 1850 – or about 1.11 °C (2 °F) in total. Since 1982, the average annual increase has been 0.20 °C (0.36 °F) per decade, more than three times as fast. What’s more, this trend is projected to increase by between 1.5 and 2 °C…

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Hints of a hidden structure detected at the edge of the Solar System

Hints of a hidden structure detected at the edge of the Solar System

Science Alert reports: If you travel far enough away from the Sun, the Solar System becomes a lot more populated. Out past the orbit of Neptune lies the Kuiper Belt, a vast, ring-shaped field of icy rocks. This is where Pluto resides, and Arrokoth, and countless other small objects in the cold and the dark. These are known as Kuiper Belt objects or KBOs, and astronomers have just found hints of an unexpected rise in their density, between 70 and…

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In an epic cosmology clash, rival scientists begin to find common ground

In an epic cosmology clash, rival scientists begin to find common ground

Science News reports: The biggest clash in cosmology might be inching closer to resolution, thanks to the James Webb Space Telescope. Scientists disagree over the universe’s expansion rate, known as the Hubble constant. There are two main methods for measuring it — one based on exploding stars called supernovas and the other on the universe’s oldest light, the cosmic microwave background. The two techniques have been in conflict for a decade, in what’s known as the “Hubble tension.” If this…

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