The word “Universe” comes from the Latin “Universum”, which was used by Roman authors to refer to the cosmos as they knew them. This consisted of the Earth and all life as well as the Moon, the Sun, the planets that they knew about (Mercury, Venus, Mars, Jupiter, Saturn) and the stars.
The term “cosmos”, on the other hand, is derived from the Greek word kosmos, which means "order" or “the world”. Other words commonly used to define all of known-existence include “Nature” (from the Germanic word natur) and the English word “everything” (self-explanatory).
Today, the word Universe is used by scientists to refer to all existing matter and space. This includes the Solar System, the Milky Way, all known galaxies, and superstructures. In terms of modern science and astrophysics, it also includes all time, space, matter, energy, and the fundamental forces that bind them.
Cosmology, on the other hand, is used to describe the study of the Universe (or cosmos) and the forces that bind it. Thanks to thousands of years of scholarship, what we know about the physical Universe has grown by leaps and bounds. And yet, there is still so much that we don’t understand.
Sourced through Scoop.it from: interestingengineering.com
The post What Do We Really Know About the Universe? appeared first on Antonios Bouris.
Read in browser »
 
Here’s the reality: We’re messing up the Earth and any far-out ideas of colonizing another orb when we’re done with our own are wishful thinking. That’s according to Michel Mayor, an astrophysicist who was a co-recipient of the Nobel Prize in physics this year for discovering the first planet orbiting a sun-like star outside of our solar system.
"If we are talking about exoplanets, things should be clear: We will not migrate there," he told Agence France-Presse (AFP). He said he felt the need to "kill all the statements that say, ‘OK, we will go to a livable planet if one day life is not possible on Earth.’"
Sourced through Scoop.it from: www.livescience.com
The post Humans Will Never Live on an Exoplanet, Nobel Laureate Says. Here’s Why appeared first on Antonios Bouris.
Read in browser »
Analysis – The theme for World Health Day in 1995 was "Target 2000 — A World Without Polio". I delivered a lecture titled "Polio Eradication Race: Will Nigeria Finish Last?" to mark the occasion. Finishing last seemed likely because in the 1990s Nigeria’s routine immunisation rates were in the…
Sourced through Scoop.it from: allafrica.com
The post Nigeria: Valuable Lessons From Nigeria’s Marathon Effort to Eradicate Polio appeared first on Antonios Bouris.
Read in browser »
Recent Articles:
|
