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The ongoing search for signs of life on Mars relies in part on terrestrial analogs – places on Earth closely resembling the past or current geology and climate of the red planet that can be readily ex...
Academy of Mathematics and Systems Science, CAS Colloquia & Seminars：Precise late-time asymptotics for the scalar field in the interior of Kerr BH and SCC
KerrBH SCC 内部标量场 精确后期 渐近性 Kerr-Cauchy视界
2023/5/16
In this talk, I will introduce the precise late-time asymptotics for the scalar field in the interior of a non-static subextreme Kerr black hole, which provides a new proof of the generic $H^1_{loc}$-...
Astronomers see carbon dioxide on planet outside solar system for first time（图）
詹姆斯韦伯 太空望远镜 系外行星 大气
2023/6/25
Scientists using NASA’s James Webb Space Telescope have captured definitive evidence of carbon dioxide in the atmosphere of a planet beyond our solar system.
Birth of magnetar from colossal collision potentially spotted for first time（图）
Birth of magnetar colossal collision potentially spotted first time
2020/11/20
Long ago and far across the universe, an enormous burst of gamma rays unleashed more energy in a half-second than the sun will produce over its entire 10-billion-year lifetime.After examining the incr...
Computers can learn to find solar flares in vast streams of images and help scientists issue timely space weather alerts, according to a new NSF-funded study. The research was published in the Journal...
New Gravitational Wave Hits Earth--For The First Time,3 Detectors Zoom In On Its Location（图）
New Gravitational Wave Earth The First Time 3 Detectors Zoom On Its Location
2017/10/24
For the first time, three detectors have tracked the gravitational waves emitted by a merger of two black holes -- a critical new capability that allows scientists to more closely locate a gravitation...
Gravitational waves carry information about their origins and about the nature of gravity that cannot otherwise be obtained. Physicists on the LIGO and Virgo teams concluded that, as with LIGO’s first...
Collisional evolution and reddening of asteroid surfaces–I. The problem of conflicting time-scales and the role of size-dependent effects
meteorites meteors meteoroids–minor planets asteroids: general
2015/12/25
Space weathering is the generic term used for processes that modify the optical properties of surfaces of atmosphereless rocky bodies under exposure to the space environment. The general agreement abo...
A distant quasar may have its light split into multiple images by a foreground galaxy cluster that acts as a gravitational lens. The light travels along different paths of differing lengths to form ea...
ALMA Witnesses Assembly of Galaxies in the Early Universe for the First Time
ALMA Witnesses Assembly of Galaxies Early Universe First Time
2015/8/4
The Atacama Large Millimeter/submillimeter Array (ALMA) has detected the most distant clouds of star-forming gas yet found in normal galaxies in the early Universe. The new observations allow astronom...
Lynden-Bell & Kalnajs (1972) presented a useful formula for computing the long-range torque between spiral arms and the disk at large. The derivation uses second-order perturbation theory and assumes ...
The Assembly of Galaxies Over Cosmic Time
cosmology: observations galaxies: evolution galaxies: formation galaxies: high-redshift galaxies: stellar content galaxies: structure
2014/12/9
To Understand how galaxies were assembled across the cosmic time remains one of the most outstanding questions in astronomy. The core of this question is how today's Hubble Sequence, namely the differ...
SwRI-led team telescope effort reveals asteroid’s size for the first time（图）
asteroid’s size team telescope
2014/12/1
Boulder, Colo. — Nov. 10 — When the double asteroid Patroclus-Menoetius passed directly in front of a star on the night of Oct. 20, a team of volunteer astronomers across the U.S. was waiting.
NOAO/Gemini: Sakurai's Object: Stellar evolution in real time
NOAO/Gemini Sakurai's Object Stellar evolution real time
2014/4/16
Stellar lifetimes are measured in billions of years, so changes in their appearance rarely take place on a human timescale. Thus an opportunity to observe a star passing from one stage of life to anot...
Time dependent embedding of spherically symmetric Rindler spacetime
anisotropic cosmic fluid MS energy curved Rindler ric heat flux
2012/2/21
An anisotropic cosmic fluid with radial heat flux which sources a time dependent Rindler geometry is investigated. Even though its energy density $\rho$ is positive, the radial and transversal pressur...