NASA and Google announced a “major discovery”on Thursday: another solar system with eight planets.
That finding is due to the discovery of a new planet, Kepler-90i – a hot, rocky orb circling a sun-like star called Kepler-90, which is 2,545 light-years from Earth.
The planet was found using a machine-learning system from Google, which was put to work sifting through data from NASA’s Kepler spacecraft.
Maybe Newtonian physics doesn’t need dark matter to work.
“There are no ‘dark matter people’ and ‘MOND people,’ ” his colleague retorted.
“I am ‘MOND people,’” Milgrom proudly proclaimed, referring to Modified Newtonian Dynamics, his theory that fixes Newtonian physics instead of postulating the existence of dark matter and dark energy—two things that, according to the standard model of cosmology, constitute 95.1 percent of the total mass-energy content of the universe.
Black holes are vast, matter-annihilating objects that seem to defy physics by their very existence. They’re so weird, that when Albert Einstein’s equations first predicted the existence of these beasts, he didn’t believe they could actually be real.
And you can’t really blame him, because the idea that we have these singularities of space-time intent on sucking up all the matter around them scattered all around our cosmic backyard is pretty hard to wrap your head around.
The smallest sculptures ever made
Jonty Hurwitz is an artist, engineer and entrepreneur who set out to create nanosculptures, the world’s most miniscule sculptures – but there is nothing small about this scientific feat of art.
The planets orbit a dwarf star named Trappist-1, about 40 light years, or about 235 trillion miles, from Earth. That is quite close, and by happy accident, the orientation of the orbits of the seven planets allows them to be studied in great detail.
One or more of the exoplanets — planets around stars other than the sun — in this new system could be at the right temperature to be awash in oceans of water, astronomers said, based on the distance of the planets from the dwarf star.
In our terrestrial view of things, the speed of light seems incredibly fast. But as soon as you view it against the vast distances of the universe, it’s unfortunately very slow. This animation illustrates, in realtime, the journey of a photon of light emitted from the surface of the sun and traveling across a portion of the solar system, from a human perspective.
The Myth: The filling of the reservoir behind Three Gorges Dam in China changed the rotation of the Earth.