The variety and origin of materials accreted by Bennu's parent asteroid [0.03%]
本努母体 asteroid吸积物质的多样性及来源
J J Barnes,A N Nguyen,F A J Abernethy et al.
J J Barnes et al.
The first bodies to form in the Solar System acquired their materials from stars, the presolar molecular cloud and the protoplanetary disk. Asteroids that have not undergone planetary differentiation retain evidence of these primary accrete...
Detection of organic compounds in freshly ejected ice grains from Enceladus's ocean [0.03%]
土卫二海洋中有机化合物的检测
Nozair Khawaja,Frank Postberg,Thomas R O&#x;Sullivan et al.
Nozair Khawaja et al.
Saturn's moon Enceladus ejects a plume of ice grains and gases originating from a subsurface ocean via fractures near its south pole. The chemical characterization of organic material in such ice grains was previously conducted via the anal...
Global heliospheric termination shock strength in the solar-interstellar interaction [0.03%]
太阳风层激波的全球结构及其在日球层与星际空间相互作用中的角色
E J Zirnstein,R Kumar,B L Shrestha et al.
E J Zirnstein et al.
A heliospheric termination shock (HTS) surrounds our Solar System at approximately 100 astronomical units from the Sun, where the expanding solar wind (SW) is compressed and heated before encountering the interstellar medium. HTS-accelerate...
Margot Leemker,John J Tobin,Stefano Facchini et al.
Margot Leemker et al.
Water is essential to our understanding of the planet-formation process and habitability on Earth. Although trace amounts of water are seen across all phases of star and planet formation, the bulk of the water reservoir often goes undetecte...
Calcium in a supernova remnant as a fingerprint of a sub-Chandrasekhar-mass explosion [0.03%]
超新星遗迹中的钙作为次钱德拉塞卡质量爆炸的指纹标识
Priyam Das,Ivo R Seitenzahl,Ashley J Ruiter et al.
Priyam Das et al.
Type Ia supernovae play a fundamental role as cosmological probes of dark energy and produce more than half of the iron in our Galaxy. Despite their central importance, a comprehensive understanding of their progenitor systems and triggerin...
A hot white dwarf merger remnant revealed by an ultraviolet detection of carbon [0.03%]
紫外线探测到碳的白矮星合并遗迹表明是一颗炽热的白矮星
Snehalata Sahu,Antoine Bédard,Boris T Gänsicke et al.
Snehalata Sahu et al.
Atmospheric carbon has been detected in the optical spectra of six hydrogen-rich ultra-massive white dwarfs, revealing large carbon abundances (log(C/H) > -0.5) attributable to the convective dredge-up of internal carbon into thin hydrogen ...
Determination of the mass distribution of the first stars from the 21-cm signal [0.03%]
通过21厘米信号确定第一代恒星的质量分布
T Gessey-Jones,N S Sartorio,H T J Bevins et al.
T Gessey-Jones et al.
The formation of the first stars and the subsequent population of X-ray binaries represents a fundamental transition in the state of the Universe as it evolves from near homogeneity to being abundant in collapsed structures such as galaxies...
Observations of fine coronal structures with high-order solar adaptive optics [0.03%]
高阶太阳自适应光学观测下的精细日冕结构
Dirk Schmidt,Thomas A Schad,Vasyl Yurchyshyn et al.
Dirk Schmidt et al.
Resolving fine structures in the Sun's corona may provide key insights into rapid eruptions and the heating of the corona. Adaptive optics systems have been used for over two decades to reach the diffraction limit of large telescopes, there...
Álvaro Ribas,Miguel Vioque,Francesco Zagaria et al.
Álvaro Ribas et al.
The detection of planets in protoplanetary disks has proven to be extremely challenging. By contrast, rings and gaps, usually attributed to planet-disk interactions, have been found in virtually every large protoplanetary (Class II) disk ob...
A nearby dark molecular cloud in the Local Bubble revealed via H2 fluorescence [0.03%]
通过H2荧光发现局部气泡中的一个近邻暗分子云
Blakesley Burkhart,Thavisha E Dharmawardena,Shmuel Bialy et al.
Blakesley Burkhart et al.
A longstanding prediction in interstellar theory posits that significant quantities of molecular gas, crucial for star formation, may be undetected due to being 'dark' in commonly used molecular gas tracers, such as carbon monoxide. We repo...