The concept of space is considered to be of fundamental importance to an understanding of the physical universe. However, disagreement continues between philosophers over whether it is …

Discover what we know about space, where it starts, how we measure it, and what floats around in it, from supermassive black holes to giant stars, freezing nebulae and fascinating other worlds.

Feb 17, 2022 · Space is the zone above and around our planet where there is no air to breathe or to scatter light. Space is a vacuum, but it is far from empty.

Sep 16, 2025 · Space is vast and full of mysteries. Many of them are yet to be solved, even though science has moved really far. Let’s sum up what is known at this point. What is space? …

Oct 16, 2025 · Space, a boundless, three-dimensional extent in which objects and events occur and have relative position and direction. Space is treated in a number of articles. For a …

In space, no one can hear you scream. This is because there is no air in space – it is a vacuum. Sound waves cannot travel through a vacuum. 'Outer space' begins about 100 km above the …

Of all the great unknowns in outer space, the dark universe might just be the most mysterious. Learn the basics of dark energy and dark matter and how scientists study this nearly …

t fill space. In some cases, we can identify what they’re made of and even produce little condensates. One could say that they (the ethers, not the physicists) condense spontaneously …

Feb 26, 2010 · First, some simple answers: space is everything in the universe beyond the top of the Earth's atmosphere - the Moon, where the GPS satellites orbit, Mars, other stars, the Milky …

As we peer into space from our home planet, whether with our naked eye or with the most powerful telescope, we are looking back through time. Light arriving at our eyes carries …