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Reference Terms
from Wikipedia, the free encyclopedia

Spacetime

In physics, spacetime is a model that combines 3-D space and 1-D time into a single construct called the space-time continuum (the 4th dimension).

Note:   The above text is excerpted from the Wikipedia article "Spacetime", which has been released under the GNU Free Documentation License.
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Space & Time News
February 23, 2024

Astronomers have characterized a bright quasar, finding it to be not only the brightest of its kind, but also the most luminous object ever observed. Quasars are the bright cores of distant galaxies and they are powered by supermassive black holes. ...
The supermassive black hole in the center of the Milky Way is spinning so quickly it is warping the spacetime surrounding it into a shape that can look like a football, according to a new study. That football shape suggests the black hole is ...
A few years ago, astronomers uncovered one of the Milky Way's greatest secrets: an enormous, wave-shaped chain of gaseous clouds in our sun's backyard, giving birth to clusters of stars along the spiral arm of the galaxy we call home. Naming this ...
Saturn's moon Mimas harbors a global ocean beneath its icy shell, discovered through analysis of its orbit by Cassini spacecraft data. This ocean formed just 5-15 million years ago, making Mimas a prime candidate for studying early ocean formation ...
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