A Jupiter-mass companion to a solar-type star The presence of a Jupiter-mass companion to the star 51 Pegasi is inferred from observations of periodic variations in the star's radial velocity. The comp... M Mayor,D Queloz - 《Nature》 被引量: 3499发表: 0年 The Lick Planet Search: ...
the largest and most massive in the solar system, having a sidereal period of revolution about the sun of 11.86 years at a mean distance of 778.6 million kilometers (483.8 million miles), a mean diameter of approximately 143,000 kilometers (89,000 miles), and a mass approximately 320 times...
solar wind/ Jupitersubstorm-like processesJovian magnetotailGalileo spacecraftiogenic mass releaseterrestrial substormmagnetotail reconfiguration[1] The Jupiter orbiting spacecraft Galileo has provided evidence that the Jovian magnetotail is subject to a periodic process with typical timescales of several days ...
Jupiter, named after the king of the gods in Roman mythology, is the fifth planet from the Sun and the largest planet in our solar system. It is a gas giant with a diameter of about 142,984 kilometers and a mass that is approximately two and a half times the combined mass of all t...
mass spectrometerconstituentmagnetic fieldneonthat do not interact with visible and infrared light. As the probe descended through the atmosphere on its parachute, its spectrometer also studied variations in abundance with altitude. This experiment finally detected the previously missing hydrogen sulfide, wh...
to be considerably larger than it is to account for its mass. On the other hand, hydrogen must predominate,constitutingat least 70 percent of the planet by mass, regardless of form—gas, liquid, or solid. The Galileo probe measured a proportion for helium of 24 percent by mass in Jupiter...
The fifthplanetfrom theSun, Jupiter is the largest planet in thesolar system. It has about 318 times the mass ofEarth, and around 1320 times the volume. Jupiter is made mostly of hydrogen and helium, similar to the Sun, and is known as agas giant. ...
We report precise Doppler measurements of GJ849 (M3.5V) that reveal thepresence of a planet with a minimum mass of 0.82 Mjup in a 5.16 year orbit. Ata = 2.35 AU, GJ849b is the first Doppler-detected planet discovered around an Mdwarf to orbit beyond 0.21 AU, and is only the second...
It has been theorised that the gas giant is a failedstar, that was not big enough to start the chain reactions that would allow it to fuse hydrogen into helium. When it comes to being a star, it is all about mass rather than size. The smallest star so far discovered is EBLM J0555...
mass above solar. Those stars where there is an indication for similar (yet undetected) companions from PMa are intermediate in distance and mass. This figure shows that the planets discovered so far in the BPMG are around the three A-F stars closest to the Sun. It is then very ...