恒星

恒星最新动态

This is a still image of the animation showing Gaia’s star-formation map in 3D.
太空望远镜

作者：Andrew Paul

SN 2021yfj is a new kind of supernova, challenging our understanding of stellar evolution. Its progenitor lost its outer shells well before the supernova happened and only consisted of its oxygen/silicon core — unlike any known star in the Milky Way. The dying, stripped-to-the-bone star experienced extreme mass loss episodes that led to the ejecting of material rich in silicon (grey), sulfur (yellow) and argon (purple).
黑洞

作者：Andrew Paul

A study led by the Center for Astrophysics | Harvard & Smithsonian (CfA) has captured the explosive interaction between a black hole and a nearby massive star (blue), as depicted in this artist's conception. As the separation between the star and the black hole decreased, the black hole's intense gravity pulled gas and dust off of the star into a disk. Before the star was able to swallow the black hole, gravitational stress from the black hole triggered the star's explosion. Collisions between the stellar explosion and shells of material from earlier interactions located above and below the disk powered a dramatic re-brightening event. This artist’s graphic shows the massive star and black hole before the supernova explosion, when the star’s shape is stretched by gravitational forces from the black hole. Credit: Melissa Weiss/CfA
黑洞

作者：Andrew Paul

An artist’s impression of the “Cosmic Grapes” galaxy, composed of at least 15 massive star forming clumps—far more than current theoretical models predict could exist within a single rotating disk at this early time. Credit: NSF/AUI/NSF NRAO/B. Saxton
太空望远镜

作者：Andrew Paul

Photo of galaxy with zoom in box showing Betelgeuse and companion star
太空望远镜

作者：Andrew Paul

This image, taken with ESO’s Very Large Telescope (VLT), shows the supernova remnant SNR 0509-67.5. These are the expanding remains of a star that exploded hundreds of years ago in a double-detonation – the first photographic evidence that stars can die with two blasts. The data were captured with the Multi-Unit Spectroscopic Explorer (MUSE) instrument at the VLT. MUSE allows astronomers to map the distribution of different chemical elements, displayed here in different colours. Calcium is shown in blue, and it is arranged in two concentric shells. These two layers indicate that the now-dead star exploded with a double-detonation.
太阳系

作者：Laura Baisas

Full GOTO-North node under the skies of La Palma.
太空望远镜

作者：Andrew Paul

An unlucky massive star approaches a supermassive black hole
黑洞

作者：Andrew Paul

Deep ALMA observations of 12CO emission from fifteen protoplanetary disks reveal a stunning range of structures in the gas morphology including gaps, rings and spirals.
系外行星

作者：Andrew Paul

This is an artist’s impression of the exoplanet 2M1510 (AB) b’s unusual orbit around its host stars, a pair of brown dwarfs. The newly discovered planet has a polar orbit, which is perpendicular to the plane in which the two stars are travelling. Polar planets around single stars had been found before, as well as polar discs of gas and dust capable of forming planets around binary stars. But thanks to ESO’s Very Large Telescope (VLT) this is the first time we have strong evidence that such a planet actually exists in a polar orbit around two stars. The two brown dwarfs appear as a single source in the sky, but astronomers know there are two of them because they periodically eclipse each other. Using the UVES spectrograph on the VLT they measured their orbital speed, and noticed that their orbits change over time. After carefully ruling out other explanations, they concluded that the gravitational tug of a planet in a polar orbit was the only way to explain the motion of the brown dwarfs.
系外行星

作者：Andrew Paul

An artistic rendering of the newly discovered binary star system in the moment where the first white dwarf has just exploded, hurtling material towards its nearby companion which is on the cusp of explosion too. This event will occur in about 23 billion years, yet in only 4 seconds do both stars explode
太阳系

作者：Laura Baisas

NASA’s James Webb Space Telescope observed Herbig-Haro 49/50, an outflow from a nearby still-forming star, in high-resolution near- and mid-infrared light.
太空望远镜

作者：Andrew Paul

drone flying for aerial night photography
无人机

作者：Andrew Paul

an illustration of an orange dot orbiting a larger orangish body in space
系外行星

作者：Laura Baisas

A purplish spiral galaxy with red and yellow space objects.
深空

作者：Briley Lewis

Gold atom with nucleus and floating particles to depict what is matter
粒子物理学

作者：拉胡尔·拉奥

Iridescent Running Chicken Nebula with glowing gases and stars
火星

作者：Annie Colbert

M101, also known as the Pinwheel galaxy, captured by the Hubble Space Telescope.
深空

作者：乔恩·凯尔维

A total solar eclipse, a bright ring of sunlight around a dark moon on July 2, 2019.
月球

作者：Laura Baisas

Two people, silhouetted, looking up at a clear night sky.
火星

作者：Briley Lewis

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