40 results for “planet”
Space & the Universe
Exoplanets: Worlds Around Other Stars
planet's mass. The second method, which has found most known planets, looks for a dip. If a planet
Article · 3 min read
Planets & the Solar System
Uranus and Neptune
planets appear blue. Neptune is a deeper shade, for reasons that are still debated. Uranus: the planet
Article · 4 min read
Planets & the Solar System
Comets, Asteroids and Pluto
planets drift millions of leftover worlds: rocky asteroids, icy comets and dwarf planets like Pluto. They
Article · 4 min read
Planets & the Solar System
Mars
planet. Visitors from Earth More spacecraft have been sent to Mars than to any other planet
Article · 4 min read
Planets & the Solar System
Mercury and Venus
planets closer to the Sun than Earth could hardly be more different: one a scorched, airless
Article · 3 min read
Planets & the Solar System
Saturn
planet is the jewel of the solar system, and its moons include a world with methane
Article · 4 min read
Planets & the Solar System
Jupiter
planet, not a failed star. A planet without a surface Jupiter is a gas giant. There
Article · 3 min read
Planet Earth
Inside the Earth
planet beneath you. Humans have explored almost none of it. The deepest mine goes down four
Article · 4 min read
Planet Earth
The Atmosphere
planet with free oxygen in its air is a planet with life. Layers The atmosphere has no sharp
Article · 4 min read
Planet Earth
The Oceans
planet, mostly in darkness and under crushing pressure. We have mapped the surface of Mars in more
Article · 4 min read
Plants & Fungi
Trees and Forests
planet's land species and a vast store of carbon. A tree is a plant that
Article · 4 min read
Life & Biology
Bacteria and Viruses
planet's chemistry. Most are harmless; some keep you alive; a few can kill you. Take
Article · 4 min read
Planets & the Solar System
The Moon
planet, about a quarter of Earth's diameter, and rocks brought back by the Apollo astronauts
Article · 4 min read
Space & the Universe
Nebulae
planets are presumably forming right now. Our own Sun and its planets were born in a cloud
Article · 3 min read
Matter, Energy & Physics
Gravity
planets in orbit, lights the stars and shapes the universe. Newton described it; Einstein explained it as the bending
Article · 4 min read
Planet Earth
Weather and Climate
planet unevenly. Nothing in daily life is discussed more and understood less than the weather. Every
Article · 4 min read
Space & the Universe
Dark Matter and Dark Energy
planets in the universe and you get about 5 percent of what the universe appears to weigh
Article · 3 min read
Life & Biology
The Origin of Life
planet, chemistry became biology. Nobody knows exactly how, but the clues are piling up. Four and a half
Article · 4 min read
Chemistry
Water: The Strangest Ordinary Substance
planet and makes up most of your body, yet it breaks nearly every rule a small
Article · 3 min read
Planet Earth
Plate Tectonics and Earthquakes
planet Earthquakes cannot be predicted; nobody can say the day or year one will strike. But their
Article · 4 min read
Planets & the Solar System
The Sun
planet in orbit from billions of kilometres away. A nuclear furnace At the centre of the Sun, the weight
Article · 4 min read
Planet Earth
Volcanoes
planet. Ash falls out of the air within days, but sulphur dioxide reaches the stratosphere and forms
Article · 4 min read
Plants & Fungi
Fungi
planet's recyclers, the partners of nearly every plant, and the source of bread, beer and penicillin
Article · 4 min read
Space & the Universe
Space Exploration
planet in the solar system. Space exploration is one of the great adventures of the modern
Article · 3 min read
Animals
Animal Migration
planet, trading the cost of travel for a year of plenty. Many also move to breed
Article · 4 min read
Life & Biology
What Is Life? The Cell
planet. Others, like oak trees and people, are vast cooperatives. Your body is made of roughly
Article · 4 min read
Animals
Whales and Dolphins
planet's oxygen. A single great whale carries about 30 tonnes of carbon to the seabed
Article · 4 min read
Plants & Fungi
Photosynthesis: How Plants Eat Light
running far faster. The green chemistry of the leaf is, quite simply, what makes the planet habitable.
Article · 3 min read
Matter, Energy & Physics
The Periodic Table
planets. The calcium in your bones and the iron in your blood are star material. The elements
Article · 4 min read
Space & the Universe
Galaxies and the Milky Way
planets circle those stars. What we still don't know The spiral arms themselves remain a puzzle
Article · 4 min read
Space & the Universe
The Big Bang
planet, atom and ray of light, was once packed into a space far smaller than a grain
Article · 4 min read
Chemistry
The Chemistry of Life
planet. You cannot digest cellulose, but it is the fibre that keeps your gut healthy. Lipids
Article · 3 min read
Animals
Birds
planet, and their declines, nearly three billion fewer birds in North America than fifty years ago, are an early
Article · 3 min read
Matter, Energy & Physics
Energy and Heat
planet's surface every moment. The physics permits a solution. The engineering is the hard part
Article · 4 min read
Planet Earth
Rocks, Minerals and Fossils
planet itself. Why it matters Rocks are the only record of the deep past. They tell
Article · 4 min read
Matter, Energy & Physics
Light
planet. It runs the fibre-optic cables that carry the internet, the lasers in surgery and manufacturing
Article · 4 min read
Matter, Energy & Physics
Atoms
planets is wrong, though. Electrons do not have paths. Quantum mechanics describes each as a cloud
Article · 4 min read
Space & the Universe
Black Holes
planet working as one Earth-sized instrument, released the first image of a black hole: a glowing
Article · 3 min read
Life & Biology
Evolution
planet with other human species, including Neanderthals, and DNA shows we interbred with them; most people
Article · 4 min read
Life & Biology
Dinosaurs and Mass Extinctions
planet. Three others, at the ends of the Ordovician, Devonian and Triassic periods, each killed off more
Article · 3 min read
