These are organized by a classification scheme developed exclusively for Cosma. More…
gravity : (1) : the gravitational attraction of the mass of the earth, the moon, or a planet for bodies at or near its surface (2) : a fundamental physical force that is responsible for interactions which occur because of mass between particles, between aggregations of matter (such as stars and planets), and between particles (such as photons) and aggregations of matter, that is 10-39 times the strength of the strong force, and that extends over infinite distances but is dominant over macroscopic distances especially between aggregations of matter — called also gravitation, gravitational force — Webster
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light —are brought toward (or gravitate toward) one another. On Earth, gravity gives weight to physical objects, and the Moon’s gravity causes the ocean tides. The gravitational attraction of the original gaseous matter present in the Universe caused it to begin coalescing, forming stars – and for the stars to group together into galaxies – so gravity is responsible for many of the large scale structures in the Universe. Gravity has an infinite range, although its effects become increasingly weaker on farther objects. — Wikipedia
Cambridge Digital Library Starts Off by Posting Newton’s Papers (Jennifer Howard, Chronicle of Higher Education)
Papers of Sir Isaac Newton (Cambridge University Library)
The Newton Project:Newton’s Writings as He Wrote Them (The Newton Project)
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- Surprise twist suggests stars grow competitivelyon April 16, 2021 at 12:41 pm
A survey of star formation activity in the Orion Nebula Cluster found similar mass distributions for newborn stars and dense gas cores, which may evolve into stars. Counterintuitively, this means that the amount of gas a core accretes as it develops, and not the initial mass of the core, is the key factor in deciding the final mass of the produced star.
- New NASA visualization probes the light-bending...on April 15, 2021 at 7:06 pm
A pair of orbiting black holes millions of times the Sun's mass perform a hypnotic pas de deux in a new NASA visualization. The movie traces how the black holes distort and redirect light emanating from the maelstrom of hot gas—called an accretion disk—that surrounds each one.
- Peering through the clouds of Earth's 'Evil Twin'...on April 15, 2021 at 4:44 pm
U.S. Naval Research Laboratory scientists were recently left scratching their heads over a familiar sight in the sky. Venus images are nothing new, but a solar probe surprised the researchers by seeing through the planet's clouds. NRL's Wide-field Imager for Parker Solar Probe (WISPR) took a stunning image of Earth's celestial neighbor Venus last year that left researchers searching for answers as to how what they were seeing was possible. Expecting to see just the featureless Venusian clouds, […]
- Glacier melt to redirect Alaska's Alsek River,...on April 15, 2021 at 2:11 pm
The Alsek River flows from the Yukon Territory in northern Canada to the Pacific Ocean, with its mouth right on the edge of Glacier Bay National Park in Alaska. On its course, the Alsek cuts through some of the wildest country in North America—glaciers plunge into bright blue water, mountains tower in distance, and grizzly bears hunt wild salmon along its wildflower-studded banks. This wilderness has made the Alsek host to one of the world's most renowned rafting routes, from the Yukon to the […]
- New research finds oceanic upwelling defies prior...on April 14, 2021 at 1:23 pm
A new scientific discovery in Australia by Flinders University has recorded for the first time how ghost currents and sediments can 'undo' the force of gravity.