Albert Einstein was not exaggerating when he said that his gravitational field equations presented 'very serious' mathematical difficulties. In fact, it took nearly 90 years from the publication of his paper on general relativity to the first successful solution of the two-body problem: the merger...
For example, dark matter was discovered when American astronomers Vera Rubin and Kent Ford discovered that some galaxies are rotating so fast that the gravitational influence of their visible matter would not be sufficient to hold them together. The gravity of dark matter is the glue that prevents...
All the pieces of Ricky McCormick’s life were held together by the gravitational pull of downtown St Louis. It was where he grew up and went to school (sometimes), it was where he worked (sometimes) and travelled around on the buses, it was how he talked, it was where he lived (...
The gravitational forces of the Sun, Moon, and planets do change the tilt of the Earth’s axis, but much more slowly than the changes Dodwell measured. An extraterrestrial body striking the Earth would provide an abrupt change in axis orientation, not the smooth changes Dodwell measured. Also...
"Dark matter," as it is called, cannot be seen directly, and it hasn't yet been detected by indirect means, either. Instead, dark matter's existence and properties are inferred from its gravitational effects on visible matter, radiation and the structure of the universe. This shadowy ...
The solar maximum occurs when jupiter is closest to the Sun and the solar minimum happens when Jupiter is farthest away. This is due to the gravitational tug Jupiter produces on the Sun. Since the gravitational force changes with the inverse square of the distance between the center of masses...
http://www.ncsa.uiuc.edu/SCMS/DigLib/text/astro/Colliding-Black-Holes-Seidel3.html.parsed.bak Black Hole Collision: holes initially close – Gravitational waves emitted by a large black hole formed from the collision of two smaller holes, shown at t=27M. – Gravitational waves emitted by a...
While today'shuman bodycontains a variety of these proteins, Eirin-Lopez believes they evolved from a single ancestor millions of years ago. This finding, published recently inMolecular Biology and Evolution,is pivotal in unraveling the mysteries of DNA organization and regulation, and could someday...
The “solar constant” (as it has been historically called) at the earth is 1367 W/m², and, as energy intensity is proportional to the square of the distance away, or “r²”, the solar constant at Venus is 1367/(0.72²) = 2,636 W/m² – Venus is closer, so it receiv...
has shown that the polarization of these photons is rotated as they travel by things such as gravity waves and cosmic matter flows. By accounting for this rotation effect when observing the CMB photons, scientists may be able to investigate parts of the Universe that might otherwise remain unkno...