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.

Isaac Newton viewed space as absolute, existing permanently and independently of whether there was any matter in it. [5] In contrast, other natural philosophers, notably Gottfried Leibniz, …

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.

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 …

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? …

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 …

During the time that has passed since the launching of the first artificial satellite in 1957, astronauts have traveled to the moon, probes have explored the solar system, and …

al metaphors. Space has a life of its own, and exists independent of any matter that mi ht occupy it. Indeed, in our most fundamental equations particles—the building blocks of matter—are …

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 …