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Astrophysics

An artist's illustration shows a white dwarf (right) orbiting a large sun-like star (left) in a very short orbit, forming a "cataclysmic" binary system. Credit: M. Weiss/Center for Astrophysics Harvard & Smithsonian

A decades-old prediction has been verified: astronomers have discovered a "cataclysmic" pair of stars

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Astronomers have discovered a pair of stars with an extremely short orbit. A star similar to our sun orbits a white dwarf every 51 minutes
The overlapping galaxies -VV-191. Credit: Science: NASA, ESA, CSA, Rogier Windhorst (ASU), William Keel (University of Alabama), Stuart Wyithe (University of Melbourne), JWST PEARLS Team, Image Processing: Alyssa Pagan (STScI)

The Webb and Hubble space telescopes join forces in detecting interstellar dust - "We got more than we expected"

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A combination of photographs taken by the two large space telescopes in partially overlapping wavebands made it possible to identify new details about the role of interstellar dust in connections between neighboring galaxies
An image of the Cat's Eye Nebula taken by the Hubble Space Telescope. Credit: NASA/CXC/SAO/K.Arcand, SYSTEM Sounds (M. Russo, A. Santaguida)

"Amazing" - the Cat's Eye Nebula is seen in XNUMXD for the first time

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Astronomers have discovered rings with almost perfect symmetry in the Cat's Eye Nebula located about 3,000 light years from Earth
Artist impression of BEASTie. The image shows a gas giant planet (like Jupiter) in distant orbit around a massive blue star. It is likely that the planet was captured or stolen from another planet. The stars in the background belong to the same star-forming region and could be the star around which the BEASTie was born. Credit: Mark Garlick

Planetary robbery: Astronomers discover that stars can steal planets

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Researchers at the University of Sheffield have proposed a new source for Jupiter-like planets orbiting massive stars three times the mass of our Sun
The arms of the spiral galaxy M74, studded with pink regions of new star formation, are shown in this Hubble Space Telescope image. Credit: ESA/Hubble & NASA, R. Chandar

Stunning Hubble Image Reveals New Star Formation in the Phantom Galaxy

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Hubble's observations also paved the way for future instruments. M74 was one of the first targets of the new James Webb Powerful Space Telescope
An international team of astronomers has discovered an exoplanet that could be completely covered in water. Credit: Benoit Goujon, University of Montreal

Water world: Astronomers have discovered a planet that may be completely covered in a deep ocean

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The spectral analysis of TOI-1452 b shows that water may make up to 30% of the planet's mass, a proportion similar to that of several moons in our solar system, such as Jupiter's moons Ganymede and Callisto, and Saturn's moons Titan and Enceladus. The mass of water is only 1%
The early universe - from the big bang to the creation of the stars. Image: depositphotos.com

A sea of ​​galaxies awaits: the COMAP project will make it possible to study the early era of galaxy formation

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New COMAP radio survey will peer beneath the 'tip of the iceberg' of galaxies to reveal a hidden era of star formation
A large spotted pink wheel-like galaxy with a small inner ellipse, with a hazy blue in the middle to the right, with two smaller spiral galaxies of about the same size to the left on a black background. This image of the Wheel Galaxy and its companion galaxies is a composite from the Near Infrared Camera and Webb's Mid-Infrared Instrument, which reveals details that are difficult to see from the separate images alone. Credit: NASA, ESA, CSA, STScI

The Webb Space Telescope Peeps Into Chaos - Captures Stellar Gymnastics in the Wheel Galaxy

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Webb's instruments reveal new details about star formation
A nuclear war. Image: depositphotos.com

The Drake formula (calculating the probability of discovering intelligent aliens): the missing parameter and the fate of humanity

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The Drake formula was an attempt to calculate the probability of intelligent life on other planets. But human history shows that the formula was probably too optimistic, and that there is something missing in the calculation. This missing parameter could be critical to understanding the development of intelligent life in the galaxy, and more importantly: the development of humanity, and its chances of survival

The James Webb Telescope reveals in detail the steamy atmosphere of a distant planet

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The light spectrum - which contains information about the composition of a planetary atmosphere 1,150 light years away - reveals a clear signature of water * The strength of the signal that Webb detected hints at the significant role that the telescope will play in the search for potentially habitable planets in the coming years
The Carina Nebula in a near-infrared photograph. One of the first images taken by the Webb Space Telescope. Image credit: NASA, ESA, CSA and STScIn

NASA's Webb Telescope reveals cosmic cliffs and star-forming regions in the Carina Nebula

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"Cosmic Cliffs" images show Webb's cameras' ability to peer through cosmic dust, shedding new light on how stars form * Webb's technology could help watch the elusive process of star formation
The Southern Ring Nebula as photographed by two different instruments of the Webb Space Telescope - in the near-infrared on the left, and in the mid-infrared on the right. Image credit: NASA, ESA, CSA and STScIn

The Webb Space Telescope photographed the Southern Ring Nebula: the last show of an exploding star

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NASA's James Webb Space Telescope has revealed details of the Southern Ring Nebula that were previously hidden from astronomers. * For the first time, the second star in the binary system that one of its members has exploded can be clearly seen * First article in the series
The galaxy cluster SMACS 0723 - the first scientific photograph by the James Webb Space Telescope. This cluster acts as a gravitational lens and increases the light of distant galaxies, including those from the early universe. Photo: NASA, ESA, CSA, and STScI

The first official photograph of the Webb Space Telescope: the highest resolution image of a deep space field

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Artist's illustration shows a white dwarf star collecting debris from shattered objects in a planetary system. Credit: NASA, ESA, Joseph Olmsted (STScI)

Chaos and Destruction: A Dead Planet's Cannibalism of Its Planetary System Goes Further Than Ever Seen

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A white dwarf provides insights into the systemic chaos that occurs when a star dies
The location of the pulsar in 2006 and 2016. Credit: X-ray: NASA/CXC/SAO/L. Xi et al.

A pulsar was discovered burning through the Milky Way at a speed of more than one and a half million kilometers per hour

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Spotted by NASA's Chandra X-ray Observatory, this stellar pilot is one of the fastest objects of its kind ever observed. This surprising result gives astronomers information about how some of the largest stars end their lives.
Researchers have simulated and presented an inexpensive experiment to create and study the early stages of this process in ways previously thought unattainable with current technology. Courtesy of Princeton University

Solving the source of the powerful radio bursts

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The assessment: This is a collision of matter and antimatter in the vicinity of black holes or collapsed neutron stars known as magnetars
black holes Image: depositphotos.com

Stellar "ghost" discovered: Astronomers may have discovered a dark, freely moving "black hole"

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Unlike the supermassive black holes at the centers of galaxies, black holes with the masses of individual stars have no matter attracted to them or other nearby objects surrounding it, so they are difficult to detect
An artist's impression of two black holes about to collide and merge Image: depositphotos.com

Astrophysicists predict the strength of gravitational waves from merging supermassive black holes

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A team of researchers from Australia recently made a new prediction about the strength of this gravitational wave signal. The new estimate is based on data from the MassiveBlack-II imager, which simulates a massive region of space that resembles a slice of our universe
The galaxy cluster Abell 520, with parts suspected of being dark matter highlighted in blue. NASA

Dark matter: Should we be so sure it exists? This is how philosophy can help

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It's been more than 50 years since astronomers first proposed "dark matter," which is thought to be the most common form of matter in the universe. Even so, we have no idea what dark matter is. No one has seen dark matter directly or produced it in a lab. But are there competing theories that explain the same data better?
The partial concealment method. Illustration Aviad Panhi

For the first time the Gaia spacecraft detected two new planets

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This image, taken by astronomers using the dark energy camera on the 4-meter Victor M. Blanco at the Cerro Tulolo Inter-American Observatory captures the galaxy NGC 1566 as it spins and throws its arms through space. The spiral galaxy whose popular name is the Spanish Dancer is often studied by astronomers who study galaxy groups, stars of different ages and galactic black holes. Credit: Dark Energy Survey/DOE/FNAL/DECam/CTIO/NOIRLab/NSF/AURA

The Spanish Dancer Galaxy swirls into view

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The image was taken for the DES (Dark Energy Survey) project funded by the US Department of Energy and the National Science Foundation and whose goal is to discover the nature of dark energy by mapping millions of galaxies. The photo was taken by the camera specially designed for DES and operated between 2013 and 2019
The COBE satellite was developed by NASA's Goddard Space Flight Center to measure the dispersion of infrared and cosmic radiation from the early universe to the limits set by our astrophysical environment. Credit: Matthew Verdolivo, UC, Davis

An invisible parallel "mirror universe" may be the reason for the disagreements about the mourning constant

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According to new research, an invisible "mirror universe" of particles that interacts with our world only through gravity could be the key to solving a major mystery in cosmology today - the Hubble constant problem
This is the first image of Sagittarius A* the supermassive black hole at the center of our galaxy. This is the first direct visual evidence of the presence of this black hole. Until now, it has been recognized for its influence on the stars close to it. The black hole was imaged using the Event Horizon Telescope (EHT), an array that joined together eight existing radio observatories around Earth to create one virtual "Earth-sized" telescope. The telescope is named after the event horizon, a nickname for the boundary of the black hole beyond which no light can escape. It took five years to process the image. Credit: EHT Partnership

Improving the ability to observe the black hole at the center of the galaxy will make it possible to test Einstein's theory of general relativity

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Says Dr. Shahar Hadar, a theoretical astrophysicist from the University of Haifa and Oranim College who also works in the development of the next generation of the Event Horizon Telescope. He also explains why it took five years to produce the photo published this week and what is planned to be done in order to improve the resolution
This is the first photograph of Sagittarius A* the supermassive black hole at the center of our galaxy. This is the first direct visual evidence of the presence of this black hole. Until now, it has been recognized for its influence on the stars close to it. The black hole was imaged using the Event Horizon Telescope (EHT), an array that joined together eight existing radio observatories around Earth to create one virtual "Earth-sized" telescope. The telescope is named after the event horizon, a nickname for the boundary of the black hole beyond which no light can escape. Credit: EHT Partnership

Astronomers reveal for the first time a "radio image" of the black hole at the heart of the Milky Way

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First image of the black hole at the center of our galaxy Sagittarius A* (Sagittarius Ai Kochav) which until now has been studied for its effect on other stars, this time we can see its event horizon. Photographed by the Ofek Al-Havain partnership which connected eight radio observatories into one radio telescope the size of the Earth
An artist's impression of star formation in the early universe, a few hundred million years after the Big Bang. (Image credit: (Adolf Schaller/Space Telescope Science Institute, NASA)

It is possible that the universe will start contracting "really" soon

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In a new paper published in PNAS, three scientists attempt to model the nature of dark energy, a mysterious entity that appears to be causing the universe to expand faster and faster, consistent with previous observations of the universe's expansion.
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