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Trace gas phosphine points to volcanic activity on Venus（图）
微量气体 磷化氢 金星 火山活动
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2023/5/24
Scientists last autumn revealed that the gas phosphine was found in trace amounts in Venus’ upper atmosphere. That discovery promised the slim possibility that phosphine serves as a biological signatu...
Study:Earth’s carbon points to planetary smashup
Earth’s carbon points planetary smashup
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2016/9/12
Research by Rice University Earth scientists suggests that virtually all of Earth’s life-giving carbon could have come from a collision about 4.4 billion years ago between Earth and an embryonic plane...
Existence of Equilibrium Points and their Linear Stability in the Generalized Photogravitational Chermnykh-Like Problem with Power-law Profile
Existence of Equilibrium Points and their Linear Stability in the Generalized Photogravitational Chermnykh-Like Problem with Power-law Profile
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2011/10/14
We consider the modified restricted three body problem with power-law density profile of disk, which rotates around the center of mass of the system with perturbed mean motion. Using analytical and nu...
THE PROXIMITIES OF ASTEROIDS AND CRITICAL POINTS OF THE DISTANCE FUNCTION
Celestial mechanics Minor planets asteroids
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2010/10/29
The proximities are important for di®erent purposes, for example to evaluate the risk of collisions of asteroids or comets with the Solar-System planets. We describe a simple and e±cient method fo...
On Out of Plane Equilibrium Points in Photo-Gravitational Restricted
Radiation—Poynting–Robertson drag—binary stellar system—equilibrium points—stability
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2010/9/15
We have investigated the out of plane equilibrium points of a passive micron size particle and their stability in the field of radiating binary stellar systems Kr¨uger-60, RW-Monocerotis within the fr...
On the validity of ideal MHD in the vicinity of stagnation points in the heliosphere and other astrospheres
heliospheric boundaries magnetic fields stagnation points
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2009/5/27
The paradigm of ideal MHD is investigated in the vicinity of null points of flows and magnetic fields. These null points determine the location and geometrical shape of the heliopause (or other astrop...
Dark-matter map points to galaxy formation
galaxy Dark-matter
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2007/2/5
8 January 2007，Dark matter is fundamentally different from normal “luminous” matter that makes up stars, planets and humans. It is invisible to modern telescopes, giving off no light or heat, and it s...