15 results for “gravity”
Matter, Energy & Physics
Gravity
gravity well, and they do: the atomic clocks on GPS satellites, higher up where gravity is weaker
Article · 4 min read
Space & the Universe
Black Holes
gravity Einstein's general relativity says that gravity is not a pull but a bending of space
Article · 3 min read
Space & the Universe
Dark Matter and Dark Energy
gravity is that galaxies are embedded in enormous halos of invisible mass, five or six times
Article · 3 min read
Space & the Universe
The Big Bang
gravity, electromagnetism and the two nuclear forces, had not yet separated into their distinct forms. Within
Article · 4 min read
Planets & the Solar System
Jupiter
gravity, tugged by the other moons, flexes it like a squeezed rubber ball, heating its interior
Article · 3 min read
Planets & the Solar System
Comets, Asteroids and Pluto
gravity. They range from pebbles to worlds a couple of thousand kilometres across. Most of them
Article · 4 min read
Space & the Universe
The Life of a Star
Gravity pulls inward, trying to crush the star into the smallest possible ball. The heat of nuclear
Article · 3 min read
Space & the Universe
Galaxies and the Milky Way
gravity. Counting the stars Nobody knows exactly how many stars the Milky Way contains, because we cannot
Article · 4 min read
Planets & the Solar System
The Moon
gravity pulls harder on the near side of Earth than the far side, stretching the oceans
Article · 4 min read
Matter, Energy & Physics
Electricity and Magnetism
Gravity feels stronger only because the positive and negative charges in ordinary matter cancel so completely
Article · 4 min read
The Human Body
The Heart and Blood
gravity, which is why standing still for a long time can make you faint. Laid end to end, all the vessels
Article · 4 min read
Planets & the Solar System
Mars
gravity and, for most of its history, no moving crustal plates, its volcanoes stayed in one place
Article · 4 min read
Planets & the Solar System
Uranus and Neptune
gravity, forming a ring. The unexplored frontier A single spacecraft, Voyager 2, has visited the ice giants
Article · 4 min read
Planet Earth
The Oceans
gravity, and in some bays the water climbs more than fifteen metres between low and high
Article · 4 min read
Space & the Universe
Space Exploration
gravity, and how the human body changes, losing bone and muscle unless they exercise for hours
Article · 3 min read
