Celestial mechanics
Celestial mechanics is the branch of astronomy that deals with the motions of celestial objects. Historically, celestial mechanics applies principles of physics (classical mechanics) to astronomical o...
Hunting the mysterious dark photon: the NA64 experiment
NA64 is a new experiment at CERN searching for a particle called the dark photon, which might act as a bridge to the universe’s invisible, dark sector. Read more: http://cern.ch/go/7FZ7 Produced by:...
Astronomers Have Captured The First Images of Dark Matter That Holds Galaxies Together
The known universe contains trillion of galaxies with billions of stars in it. Looking at the big picture, the galaxies in universe are connected to each other by an invisible web of dark matter. Due ...
Brian Cox visits the world's biggest vacuum chamber
Brian Cox visits NASA’s Space Power Facility in Ohio to see what happens when a bowling ball and a feather are dropped together under the conditions of outer space...
Vera Rubin, Astrophysicist Who Confirmed Existence Of Dark Matter, Dies At 88
The astrophysicist's groundbreaking research on spiral galaxies provided evidence of invisible dark matter. She was a pioneer in an era when women were excluded from many astronomy programs.
Dark matter may just be a bunch of ancient black holes
An invisible "dark matter" outweighs all the stars in space by 4:1. But gravitational waves may soon unmask the shadowy culprit.
Could black holes be the dark matter everyone has been looking for?
As we wait for more LIGO results, a maverick theory pops up
Elusive Dark Matter Galaxy Revealed By Cosmic Lens
An invisible dark-matter galaxy hides in the edges of another larger galaxy serving as a natural magnifying glass. Astronomers probing the sky used the gravity of a massive galaxy as a natural magnif...
Understanding The Magnetic Sun
Grasping what drives that magnetic system is crucial for understanding the nature of space throughout the solar system: The sun's invisible magnetic field is responsible for everything from the solar ...
Did 'Dark Matter' Or A Star Called Nemesis Kill The Dinosaurs?
The dinosaur extinction 66m years ago was most likely caused by a comet or big asteroid hitting the Earth. But given that asteroids don't actually hit our planet very often, could this really be the w...
Mysterious Cosmic Radio Waves Could Have Come From A Starquake, Study Finds
For almost 10 years, astronomers have been trying to track down the source of mysterious cosmic radiowaves called Fast Radio Bursts (FRBs), which are brighter than our Sun, packed with energy, and fla...
New 'Stealth Dark Matter' Theory May Explain Mystery Of The Universe's Missing Mass
Lawrence Livermore National Laboratory (LLNL) scientists have come up with a new theory that may identify why dark matter has evaded direct detection in Earth-based experiments. A group of national pa...
Higgs Boson Mass Explained In New Theory
Three physicists who have been collaborating in the San Francisco Bay Area over the past year have devised a new solution to a mystery that has beleaguered their field for more than 30 years. This pro...
Mysterious Galactic Signal Points LHC To Dark Matter
It is one of the most disputed observations in physics. But an explanation may be in sight for a mysterious excess of high-energy photons at the centre of the Milky Way. The latest analysis suggests t...
Astrophysicists Draw Most Comprehensive Map Of The Universe
Astrophysicists have created a 3D map of the universe that spans nearly two billion light years and is the most complete picture of our cosmic neighbourhood to date. The spherical map of galaxy superc...
Dark matter map unveils first results
Dark matter is the invisible "web" that holds galaxies together; by watching how clumps of it shift over time, scientists hope eventually to quantify dark energy - the even more mysterious force that ...
Dark Matter Just Got Darker
Dark matter: unless you're a theoretical physicist, you're probably will have a hard time explaining just what this mysterious thing in our Universe really is. Even experts have long viewed the materi...
Astrodynamics
Orbital mechanics or astrodynamics is the application of ballistics and celestial mechanics to the practical problems concerning the motion of rockets and other spacecraft. The motion of these object...
Celestial coordinate system
In astronomy, a celestial coordinate system is a system for specifying positions of celestial objects: satellites, planets, stars, galaxies, and so on. Coordinate systems can specify a position in 3-d...
Dark matter
Dark matter is a hypothetical kind of matter that cannot be seen with telescopes but accounts for most of the matter in the Universe. The existence and properties of dark matter are inferred from its ...
Dark matter - Wikipedia
Gravitation
Hammer and feather drop: Apollo 15 astronaut David Scott on the Moon enacting the legend of Galileo's gravity experiment. (1.38 MB, ogg/Theora format).Gravity (also called gravitation) is a natural ...
Gravitation - Wikipedia
Orbit
In physics, an orbit is the gravitationally curved path of an object around a point in space, for example the orbit of a planet around the center of a star system, such as the Solar System. Orbits of ...
Orbit - Wikipedia
Axial precession
In astronomy, axial precession is a gravity-induced, slow, and continuous change in the orientation of an astronomical body's rotational axis. In particular, it refers to the gradual shift in the orie...
Axial precession - Wikipedia
Spacecraft propulsion
Spacecraft propulsion is any method used to accelerate spacecraft and artificial satellites. There are many different methods. Each method has drawbacks and advantages, and spacecraft propulsion is an...
Spacecraft propulsion - Wikipedia
Tidal shock
A tidal shock occurs when a star cluster or other distributed astronomical object passes by a large masssuch as an interstellar cloud, resulting in gravitational perturbation on a time scale that is m...