Comprehensive coverage

כוכבים

The bright twinkling is the supernova SN 2023ixf in the Vane Galaxy. Image based on telescopic data obtained on May 20, 21 and 22, 2023. Credit: Travis Dew, University of Arizona (Hosseinzadeh et al. 2023)

A once-in-a-lifetime supernova: unprecedented mapping of a stellar explosion

Solidifying white dwarfs. Credit: The Science website via DALEE

Challenging the Cosmos: White Dwarfs That Aren't Completely Dead

  • No comments
According to the new paper, in some white dwarfs, the dense plasma in the interior doesn't simply freeze from the inside out. Instead, the solid crystals that form upon freezing are less dense than the liquid, and therefore want to float, then push the liquid inside
This image from Webb's MIRI (mid-infrared) camera shows the star system Beta Pictoris. A flat disk of dust fragments, formed by collisions between planetesimals (orange), dominates the landscape and is called the "main disk plane". In the lower left corner, Webb showed the true extent of the secondary disk (cyan (turquoise), which is inclined 5 degrees relative to the primary disk. Webb also discovered a previously unseen feature called the "cat's tail." A coronagraph (a black circle and two small disks) was used to block The light of the central star. Scale bar shows that the disks of Beta Peak (pictoris) span hundreds of astronomical units (AU), where one AU is the average distance from Earth to the Sun. (In our solar system, Neptune orbits the Sun at a distance of 30 AU) in this image , light at a wavelength of 15.5 microns is shown in cyan (turquoise) and 23 microns in orange (F1550C and F2300C filters, respectively). Credit: NASA, ESA, CSA, STSCI, C. STARK and K. LAWSON (NASA GSFC), J. KAMMERER (ESO), and M. PERRIN (STSCI).

The Webb Space Telescope discovered a 'cat's tail' made of dust in the Beta Pictoris system

  • No comments
Beta Pictoris is a solar system in the making and relatively close so that the gas disks can be seen. It turns out that Webb was able to discover a structure that was not noticed in photographs with less sensitive instruments, thus he discovered a disk of gas tilted from our main disk and because of our vantage point it looks like a cat's tail
This image is from Gaia's third data release in 2022. The image above is from the new data release, and shows exactly how many new sources have been imaged at the center of the cluster. Only faint stars within Omega Centauri are marked in both images.

Gaia's Galactic Gold Mine: Star Clusters, Cosmic Lenses, Asteroids, and Unexpected Science

  • 2 תגובות
The European Space Agency's Gaia mission discovered over half a million new stars, tagged 150,000 asteroids, and identified 380 cosmic lenses. These discoveries advance our understanding of the universe, setting the stage for the expected release of Gaia DR4 data in 2025
Two nearly symmetrical swirling loops of gas and dust mark the dying flickers of an ancient red giant star. Credit: International Gemini Observatory/NOIRLab/NSF/AURA, TA Rector (University of Alaska Anchorage/NSF's NOIRLab), J. Miller (Gemini Observatory/NSF's NOIRLab), M. Rodriguez (Gemini Observatory/NSF's NOIRLab), M. Zamani ( NSF's NOIRLab)

An overflowing cosmic "urn" - telescope captures the spectacular end-of-life display of a red giant

  • No comments
This end-of-life phase of red giant stars is relatively short, and the celestial structures that form around them are rare, so the Tobi Pitcher Nebula is an excellent example of a case study in the evolution of a star
V838 Monocerotis A red variable star in the Monocros group. Illustration: depositphotos.com

Cosmic dust factories: variable stars and the origin of life

  • No comments
It was found that stars with variable light intensity influence the production of the interstellar dust and its enrichment in heavy elements from which life was created
The intensity of the light reaching us from a distant planet raises questions and even wild speculations: is it surrounded by alien technology? A simulation of the "Dyson count", which some explain as a possible solution to the mystery. Source: Vedexent / Wikimedia.

Did aliens build giant structures around a distant sun?

  • 4 תגובות
(Courtesy of Stefan Gissar and ESO, European Southern Observatory).

The Milky Way as never seen before

  • No comments
Comparison of sizes of different types of stars. From left to right: a red dwarf, with a mass of about 0.1 that of the Sun; "yellow dwarf", like our sun; A "blue dwarf" of about 8 solar masses; and the giant star R136a1, which has about 300 solar masses. Source: ESO/M. Kornmesser.

Brighter than the sun, hotter than the summer in Israel

  • 3 תגובות
This is a series of observations that began in the shortest time so far since the start of a supernova explosion. Source: Weizmann Institute magazine.

Three hours after the explosion

  • 3 תגובות
The Cancer Nebula: These supernova remnants glow with energy from a spinning neutron star driving a vortex of magnetized plasma. Source: NASA.

Strange supernovae reveal the stars' secrets

  • 2 תגובות
NGC 4649 - a compact and dense galaxy. Photo: Michigan State University in Ann Harbor

Astronomers have discovered the densest galaxy ever

  • 2 תגובות
An infrared image of the Cygnus X star-forming region colored with wavelength-coded artificial colors. Light at 3.6 microns is colored blue, light at 4.5 microns in blue-green, 8 microns in green and 24 microns in red. These images were taken before the Spitzer mission ran out of cooling gas in 2009, becoming a "hot" mission.

A look into the delivery room of stars

  • No comments
The star cluster ngc 3603 as photographed by the Hubble Space Telescope, 2010

Hubble perceives restlessness in a compact and compact cluster

  • 15 תגובות
Cepheus A HW2. Imaging, University of Bonn

The controlled magnetism diet of massive stars

  • 7 תגובות

The sun has no lithium because it has planets

  • 24 תגובות

11 billion year old supernova

  • 10 תגובות

This is what the sun will look like in 5 billion years

  • 12 תגובות

The mass of the Milky Way - a trillion suns

  • 8 תגובות

Two more stars have been discovered that escape the Milky Way forever

  • No comments
A sky map suitable for Israel on the night of October 8 and showing the northern horizon highlighting the constellations. A group of dragons is visible to the left of the middle of the picture, to the right of the group of the little bear (at the end of its tail is the North Star) to the left of a group of villains (which is part of the summer triangle), both groups are familiar and easy to identify. The image is from Stellarium, an open source astronomy software.

the three north stars

  • No comments

Hubble helped calculate the maximum mass of stars

  • No comments

The mass of the tiny star raises big astronomical questions

  • No comments

The dark secret of the dead stars

  • No comments
Science website logo
SEARCH