Category Astronomy/Space

Introducing ‘UFO’ Galaxies—the Milky Way’s Dustier Cousins

Introducing 'UFO' galaxies—the Milky Way's dustier cousins
Images of the same regions of space as observed by the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST). This bright-red UFO galaxy, circled, was almost entirely invisible in the Hubble observations. Credit: Gibson et al, 2024, The Astrophysical Journal
Images of the same region of space as observed by the Hubble Space Telescope (HST) and the James Webb Space Telescope (JWST). This bright-red UFO galaxy, circled, was almost entirely invisible in the Hubble observations. (Credit: NASA, ESA, CSA, and STScI)

In a new study, a team of astrophysicists led by CU Boulder has set out to unravel the mysteries of UFOs—not the alien spacecraft, but a class of unusually large and red galaxies that researchers have nicknamed Ultra-red Flattened Objects, or UFOs for short...

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Chandra and Hubble Tune into ‘Flame-Throwing’ Guitar Nebula

A close-up image of the guitar structure with an illustrated outline surrounding the shape.
Outline of the guitar shape in the X-ray and optical image. (Credit: X-ray: NASA/CXC/Stanford Univ./M. de Vries et al.; Optical: (Hubble) NASA/ESA/STScI and (Palomar) Hale Telescope/Palomar/CalTech; Illustrated outline: NASA/CXC/K. DiVona; Image Processing: NASA/CXC/SAO/L. Frattare)

Normally found only in heavy metal bands or certain post-apocalyptic films, a “flame-throwing guitar” has now been spotted moving through space. Astronomers have captured movies of this extreme cosmic object using NASA’s Chandra X-ray Observatory and Hubble Space Telescope.

The new movie of Chandra (red) and Palomar (blue) data helps break down what is playing out in the Guitar Nebula...

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Making Mars’s Moons: Supercomputers offer ‘Disruptive’ New Explanation

A NASA study using a series of supercomputer simulations reveals a potential new solution to a longstanding Martian mystery: How did Mars get its moons? The first step, the findings say, may have involved the destruction of an asteroid.

The research team, led by Jacob Kegerreis, a postdoctoral research scientist at NASA’s Ames Research Center in California’s Silicon Valley, found that an asteroid passing near Mars could have been disrupted—a nice way of saying “ripped apart”—by the red planet’s strong gravitational pull.

The paper is published in the journal Icarus.

The team’s simulations show the resulting rocky fragments being strewn into a variety of orbits around Mars...

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First Pairs of White Dwarf–main sequence binaries discovered in clusters shine new light on stellar evolution

Astronomers discover first pairs of white dwarf and main sequence stars in clusters, shining new light on stellar evolution
This image from the ALMA telescope shows star system HD101584 and the complex gas clouds surrounding the binary. It is the result of a pair of stars sharing a common outer layer during their last moments. Credit: ALMA (ESO/NAOJ/NRAO), Olofsson et al / Robert Cumming

Astronomers at the University of Toronto (U of T) have discovered the first pairs of white dwarf and main sequence stars—”dead” remnants and “living” stars—in young star clusters. Described in a new study published in The Astrophysical Journal, this breakthrough offers new insights into an extreme phase of stellar evolution, and one of the biggest mysteries in astrophysics.

Scientists can now begin to bridge the gap between the earliest and final stages of binary star systems—two stars that orbit a shared center of g...

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