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2019: Chinese probe Chang'e 4 becomes the first human-made object to land on the far side of the Moon. [83] 2019: NASA concludes the 15-year Opportunity rover mission after being unable to wake the rover from hibernation. [84] 2019: The first image of the supermassive black hole inside galaxy Messier 87 was captured by the Event Horizon ...
A 2019 survey indicated a clear majority of people around the world think climate change is happening and that it is all or partly down to human actions. [15] However, 17% of Americans polled agreed that "the idea of manmade global warming is a hoax that was invented to deceive people", only Saudi Arabia and Indonesia having a higher proportion ...
[10] 6 January A partial solar eclipse occurred. 8 January Researchers from the U.S. Department of Energy's Princeton Plasma Physics Laboratory (PPPL) report a new way to stabilise the "tearing modes" in fusion reactors, using radio waves to create small changes in the temperature of the plasma, allowing it to be controlled more easily. [11]
Popławski's approach is based on the Einstein–Cartan theory of gravity which extends general relativity to matter with intrinsic angular momentum ().Spin in curved spacetime requires that the affine connection cannot be constrained to zero and its antisymmetric part, the torsion tensor, must be a variable in Hamilton's principle of stationary action which gives the field equations.
A collection of population, family planning and related reproductive health and development literature. Retired in 2019. Free Knowledge for Health, Center for Communication Programs, JHSPH: Questia: Online Research Library: Multidisciplinary: Emphasis on books and journal articles in the humanities and social sciences. Closed down on December ...
Nova ScienceNow (styled NOVΛ scienceNOW) is a spinoff of the long-running and venerable PBS science program Nova.Premiering on January 25, 2005, the series was originally hosted by Robert Krulwich, who described it as an experiment in coverage of "breaking science, science that's right out of the lab, science that sometimes bumps up against politics, art, culture". [1]
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Nature 's 10 is an annual listicle of ten "people who mattered" in science, produced by the scientific journal Nature. Nominees have made a significant impact in science either for good or for bad. Nominees have made a significant impact in science either for good or for bad.