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Researchers propose a list of Venus-like planets for James Webb Space Telescope to target（图）
金星 行星物理学 詹姆斯韦伯太空望远镜
2023/6/26
A team of researchers, including Brown planetary scientist Jim Head, propose using the James Webb Space Telescope to look at five planets in the Venus Zone, a search that could reveal valuable insight...
Astronomers confirm existence of two giant, newborn planets in PDS 70 system（图）
Astronomers two giant newborn planets PDS 70 system
2020/5/22
New evidence confirms that first-ever pictures do capture the birth of a pair of planets orbiting the star PDS 70.Using a new infrared pyramid wavefront sensor for adaptive optics correction at the...
Multiple suns and young planets:NSF-supported graduate researchers lead exoplanet discoveries
Multiple suns young planets NSF-supported graduate researchers exoplanet
2016/7/15
Graduate students supported by the National Science Foundation (NSF) helped helm two separate exoplanet discoveries that could expand researchers' understanding of how planets form and orbit stars.Kev...
Preface: Evolution of the early solar system: Presolar cosmochemical fingerprints and the formation of watery rocky planets
Presolar cosmochemical fingerprints the formation of watery rocky planets
2017/4/10
Recent developments in cosmochemistry of high-precision
and high spatial resolution isotope analyses, and of
high-performance computing techniques, have enabled
cosmochemists to gain vital insight ...
Birth of planets revealed in astonishing detail in ALMA's 'best image ever'
best image ever planet
2014/11/10
Astronomers have captured the best image ever of planet formation around an infant star as part of the testing and verification process for the Atacama Large Millimeter/submillimeter Array’s (ALMA) ne...
Birth of planets revealed in astonishing detail in ALMA's 'best image ever'（图）
best image ever planets
2014/12/1
Astronomers have captured the best image ever of planet formation around an infant star as part of the testing and verification process for the Atacama Large Millimeter/submillimeter Array’s (ALMA) ne...
Young binary star system may form planets with weird and wild orbits
Young binary star system planets with weird wild orbits
2014/8/14
Unlike our solitary Sun, most stars form in binary pairs -- two stars that orbit a common center of mass. Though remarkably plentiful, binaries pose a number of questions, including how and where plan...
Controversial Clues of Two 'Goldilocks Planets' That Might Support Life are Proven False
Dwarfs Liquid water Stars Rock The planets Radiation Astrophysics
2014/7/18
03 July 2014 — Mysteries about controversial signals coming from a dwarf star considered to be a prime target in the search for extraterrestrial life now have been solved in research led by scientists...
Discovery Expands Search for Earthlike Planets（ 图）
A binary system Astronomy The sun The moon Orbit The Milky Way
2014/7/18
COLUMBUS, Ohio—A newly discovered planet in a binary star system located 3,000 light-years from Earth is expanding astronomers’ notions of where Earth-like—and even potentially habitable—planets can f...
'Death stars' in Orion blast planets before they even form（图）
Death stars they even form planets
2014/3/20
The Orion Nebula is home to hundreds of young stars and even younger protostars known as proplyds. Many of these nascent systems will go on to develop planets, while others will have their planet-form...
Evidence for enhanced chromospheric Ca II H & K emission in stars with close-in extrasolar planets
Planets and satellites magnetic fields Planet star interactions chromospheres
2012/2/23
The planet-star interaction is manifested in many ways. It was found out that a close-in exoplanet causes small but measurable variability in the cores of a few lines in the spectra of several stars w...
Gaps in Protoplanetary Disks as Signatures of Planets: I. Methodology and Validation
planet disk interactions protoplanetary disks planets and satellites detection radiative
2012/2/23
We examine the observational consequences of partial gaps being opened by planets in protoplanetary disks. We model the disk using a static alpha-disk model with detailed radiative transfer, parametri...
The HARPS search for southern extra-solar planets. XXXI. Magnetic activity cycles in solar-type stars: statistics and impact on precise radial velocities
Planetary systems – Stars: activity – Stars: chromospheres – Line: profi les – Techniques: radial velocities – Techniques:spectroscopic
2011/10/17
Context. Searching for extrasolar planets through radial velocity measurements relies on the stability of stellar photospheres. Aims. We aim at characterizing the statistical properties of magnetic ac...
A natural formation scenario for misaligned and short-period eccentric extrasolar planets
open clusters and associations: general — planets and satellites: for- mation — planetary systems: protoplanetary disks — planetary systems: planet-disc interactions — planetary systems: planet-star interactions — physical data: hydrodynamics
2011/10/8
Recent discoveries of strongly misaligned transiting exoplanets pose a challenge to the established planet formation theory which assumes planetary systems to form and evolve in isolation. However, th...
The HARPS search for southern extra-solar planets. XXX. Planetary systems around stars with solar-like magnetic cycles and short-term activity variation
stars: planetary systems – techniques: radial velocities – stars: activity – stars: individual: HD7199 – stars: individual
2011/9/30
We present the discovery of four new long-period planets within the HARPS high-precision sample: \object{HD137388}b ($M\sin{i}$ = 0.22 $M_J$), \object{HD204941}b ($M\sin{i}$ = 0.27 $M_J$), \object{HD7...