Spacetime
In physics, spacetime (also space–time, space time or space–time continuum) is any mathematical model that combines space and time into a single interwoven continuum. The spacetime of our universe is ...
Spacetime - Wikipedia
Tomorrow’s World returns to BBC with startling warning from Stephen Hawking
Humans will need to colonise another planet within one hundred years to ensure our survival, according to Professor Stephen Hawking.
Albert Einstein Facts: 51 Things You Didn't Know About Einstein
Amazing Albert Einstein facts and things you didn't know. Here are some amazing and little-known facts about life of one of the greatest minds of our time.
The Debate Over Time's Place in the Universe
Physicists can’t agree on whether the flow of future to past is real or a mental construct.
Earth's Core Is Two-And-A-Half Years Younger Than Its Crust
We have long known that gravity makes the Earth's centre age more slowly than its surface – but the effect is much more pronounced than once thought
A Space Spider Watches Over Young Stars
A nebula known as "the Spider" glows fluorescent green in an infrared image from NASA's Spitzer Space
Searching for Far Out and Wandering Worlds
Astronomers have made great strides in discovering planets outside of our solar system, termed “exoplanets.” In fact, over the past 20 years, more than 5,000 exoplanets have been detected beyond the e...
To See Deep into Space, Start Deep Underground
Some of the most advanced tools for answering fundamental mysteries of the universe lie nearly a mile deep in bedrock — but to understand such physics, sometimes it helps to have stunning visuals.
Alien Planet May Have Kicked Its Neighbor Into the Sticks
A planet found at an extreme distance from its parent star may have been kicked out by a fellow planet, new research suggests.
10 Amazing Photos Taken By Scott Kelly On His Year In Space
Commander Scott Kelly has just returned from his 340-day mission aboard the ISS. The record breaking mission has seen Kelly and Russian cosmonaut Mikhail Kornienko spend almost a year in space, and sc...
NASA researchers are working on a laser propulsion system that could get to Mars in 3 days
Despite how far we've come in space exploration, one thing still holding us back from interstellar travel is our slow spacecraft. While we're able to propel particles to close to the speed of light in...
Superbright Mars Arrives This Spring
Mars will soon be incredibly big and bright in the sky, so get your telescope ready.
Milky Way's Second Most Massive Black Hole Found?
This massive black hole candidate may be of the 'intermediate-mass' variety, possibly tying up a perplexing astrophysical puzzle.
Astronauts grow first flower in space
The zinnia, an edible flowering plant, was planted aboard the International Space Station's Veggie chamber last November to help "provide precursory information about other flowering plants that could...
Scientists prove comets can't explain alien megastructure
Three months ago, news broke that a giant "alien megastructure" could exist around a bizarre-looking star 1,500 light-years away.
When Time Breaks Down | Space Time | PBS Digital Studios
This episode on the physics of time syncs perfectly with Pink Floyd's 'Dark Side of the Moon.'
Spacetime topology
Spacetime topology is the topological structure of spacetime, a topic studied primarily in general relativity. This physical theory models gravitation as a Lorentzian manifold (a spacetime) and the co...
Spacetime symmetries
Spacetime symmetries are features of spacetime that can be described as exhibiting some form of symmetry. The role of symmetry in physics is important in simplifying solutions to many problems, spacet...
Causal structure
In mathematical physics, the causal structure of a Lorentzian manifold describes the causal relationships between points in the manifold.
In modern physics (especially general relativity) spacetim...
Minkowski space
In mathematical physics, Minkowski space, Minkowski spacetime (named after the mathematician Hermann Minkowski), or flat spacetime, is the mathematical space setting in which Einstein's theory of spec...
Quantum spacetime
In mathematical physics, the concept of quantum spacetime is a generalization of the usual concept of spacetime in which some variables that ordinarily commute are assumed not to commute and form a di...
Quantum spacetime - Wikipedia
Space
Space is the boundless three-dimensional extent in which objects and events have relative position and direction. Physical space is often conceived in three linear dimensions, although modern physicis...
Theory of relativity
The theory of relativity, or simply relativity in physics, usually encompasses two theories by Albert Einstein: special relativity and general relativity.Concepts introduced by the theories of relati...
Tomorrow’s World returns to BBC with startling warning from Stephen Hawking
Humans will need to colonise another planet within one hundred years to ensure our survival, according to Professor Stephen Hawking.
Roman ring
A Roman ring, in theoretical physics, is a configuration of wormholes where no subset of wormholes is near to chronology violation, though the combined system can be arbitrarily close to chronology vi...
Roman ring - Wikipedia
Albert Einstein Facts: 51 Things You Didn't Know About Einstein
Amazing Albert Einstein facts and things you didn't know. Here are some amazing and little-known facts about life of one of the greatest minds of our time.
The Debate Over Time's Place in the Universe
Physicists can’t agree on whether the flow of future to past is real or a mental construct.
Rolling ball clock
A rolling ball clock is a clock which displays time by means of balls and rails.
The rolling ball clock was invented by Harley Mayenschein in the 1970s. He patented the design and founded Idle Tym...
24-hour clock
The 24-hour clock is the convention of time keeping in which the day runs from midnight to midnight and is divided into 24 hours, indicated by the hours passed since midnight, from 0 to 23. This syste...
24-hour clock - Wikipedia