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Touching the sun（图）
太阳 天体物理学 帕克太阳探测器
2023/6/21
Aspacecraft launched by NASA has done what was once thought impossible. On April 28, the Parker Solar Probe successfully entered the corona of the sun — an extreme environment that’s roughly 2 million...
One of Life’s Building Blocks Found around Infant Sun-like Stars
Life’s Building Blocks Infant Sun-like Stars
2017/7/21
Our solar system is teeming with simple carbon-based molecules, the basic building blocks of life. If the conditions are right, these simple molecules can go on to form more complex, biologically inte...
The same kind of large-scale planetary waves that meander through the atmosphere high above Earth's surface may also exist on the Sun, according to a new study led by a scientist at the National Cente...
Spotlighting the sun（图）
sun Spotlighting
2014/12/1
Astronomers with the National Science Foundation (NSF)-funded National Optical Astronomy Observatory (NOAO) captured pictures not only of Thursday's partial solar eclipse, but also of the "monster" si...
Astronomers with the National Science Foundation (NSF)-funded National Optical Astronomy Observatory (NOAO) captured pictures not only of Thursday's partial solar eclipse, but also of the "monster" si...
AMHERST, Mass. – Using one of the most sensitive neutrino detectors on the planet, an international team of physicists including Andrea Pocar, Laura Cadonati and doctoral student Keith Otis at the Uni...
Analyzing sun-like stars that eat Earth-like planets
Analyzing sun-like stars eat Earth-like planets
2014/6/12
Some Sun-like stars are ‘Earth-eaters.’ During their development they ingest large amounts of the rocky material from which ‘terrestrial’ planets like Earth, Mars and Venus are made.
On using the beaming effect to measure spin-orbit alignment in stellar binaries with Sun-like components
measure spin-orbit alignment stellar binaries Sun-like components
2011/10/13
The beaming effect (aka Doppler boosting) induces a variation in the observed flux of a luminous object, following its observed radial velocity variation. We describe a photometric signal induced by t...
Constraints on dark matter models from a Fermi LAT search for high-energy cosmic-ray electrons from the Sun
Cosmic Rays Electrons Fermi Sun
2011/10/13
During its first year of data taking, the Large Area Telescope (LAT) onboard the Fermi Gamma-Ray Space Telescope has collected a large sample of high-energy cosmic-ray electrons and positrons (CREs). ...
Enhanced Sensitivity to Dark Matter Self-annihilations in the Sun using Neutrino Spectral Information
Dark Matter, Solar WIMPs, WIMP-nucleon scattering cross section, Neutrino Astronomy
2011/10/10
Self-annihilating dark matter gravitationally captured by the Sun could yield observable neutrino signals at current and next generation neutrino detectors. By exploiting such signals, neutrino detect...
Mass Loss, Destruction and Detection of Sun-grazing and -impacting Cometary Nuclei
comet sun impact sun-grazing radiation collisions
2011/9/30
Incoming sun-grazing comets almost never re-emerge, but no final destruction event has ever been observed, nor sun-impactor destruction theory developed. We seek analytic models of comet nucleus destr...
Measuring the Earth-Sun distance during a lunar eclipse
Measuring Earth-Sun distance lunar eclipse
2011/9/28
The classical method for measure the Earth-Sun distance is due to Aristarchus and it is based upon the measure of the angle Moon-Earth-Sun when the Moon is exactly in quadrature. Such an angle is only...
New findings from NASA's Solar Dynamics Observatory (SDO) reveal that the Sun's surface is an even more complicated web of physical and magnetic processes than previously thought. The finding was unve...
Context: In addition to the `facular' brightening of active regions, the quiet Sun also contains a small scale magnetic field with associated brightenings in continuum radiation. Aims: To measure the ...
HD 46375: seismic and spectropolarimetric analysis of a young Sun hosting a Saturn-like planet
seismic spectropolarimetric analysis Saturn-like planet
2010/11/15
Context. HD 46375 is known to host a Saturn-like exoplanet orbiting at 0.04 AU from its host star. Stellar light reflected by the planet was tentatively identified in the 34-day CoRoT run acquired in ...