Indirect detections of massive - presumably Jupiter-like - planets orbiting nearby Sun-like stars have recently been reported(1,2). Rocky, Earth-like planets are much more difficult to detect, but clues to their possible existence can ne... WS Holland,JS Greaves,B Zuckerman,... - 《Nature...
"It is the glue that binds galaxies together and it is responsible for our own Earth orbiting around the sun every year." Gravity was also the key player in Sir Isaac Newton's famous "apple" story. One day, Newton was hanging out in Lincolnshire, England when he watched an apple fall ...
The presence of starspots , faculae and granulation on the photosphere of a star induces quasi-periodic signals that can conceal and even mimic the Doppler signature of orbiting planets. This has resulted in several false detections (see Queloz etal. 2001 ; Bonfils etal. 2007 ; Hu茅lamo etal...
On 26 October 2007, Tamuz used the radial velocity method and found a planet with a minimum mass one and half times that of Jupiter orbiting at 1.28 AU away from HD 4113. 2007年10月26日,塔穆兹(Tamuz)使用径向速度法发现了一颗质量至少为木星的1.5倍的行星,距离HD 4113大约1.28天文单位。
11. The planetary model of the atom pictures electrons orbiting the atomic nucleus much as planets orbit the Sun. In this model you can view hydrogen, the simplest atom, as having a single electron in a circular orbit 1.06 × 10-10 m in diameter. (a) If the average speed of the elect...
The International Space Station (ISS) orbiting the Earth cruises at a speed of approximately 7.9 km/s. With its engines turned off, it is in a state of perpetual free fall, but it goes around the Earth with a speed that is just great enough to keep it from falling. ...
One potential solution is for João Luís Rosa and his team's theory to be correct about black holes being gravastars, incredibly dense objects filled with dark energy but lacking a singularity. His team looked for spots of gas bubbles orbiting black holes and modeled what should happen to ...
A recent study indicated that the inner cores of rapidly accreting (dot M > 10M_鈯 yr) CO white dwarfs may rotate differentially, with a shear rate near th... SC Yoon,N Langer - 《Astronomy & Astrophysics》 被引量: 170发表: 2005年 A Pair of Resonant Planets Orbiting GJ 876Based on ...
With our orbital velocity calculator, you can quickly estimate the following: Orbital radius of the planets; Orbital energy of the planets; Orbital speed of the planets; and Orbital period of the planets (see also the orbital period calculator). You surely know that planets orbit around stars,...
The presence of starspots , faculae and granulation on the photosphere of a star induces quasi-periodic signals that can conceal and even mimic the Doppler signature of orbiting planets. This has resulted in several false detections (see Queloz etal. 2001 ; Bonfils etal. 2007 ; Hu茅lamo etal...