33 results for “the Sun”
Planets & the Solar System
The Sun
Sun's future In about five billion years the core's hydrogen will run out. The Sun
Article · 4 min read
Planets & the Solar System
Mercury and Venus
Sun than Earth could hardly be more different: one a scorched, airless rock, the other a world
Article · 3 min read
Space & the Universe
The Life of a Star
Sun, a middling star, will manage about ten billion. A red dwarf one tenth the Sun
Article · 3 min read
Planets & the Solar System
Jupiter
Sun, and moons that may hide oceans of liquid water. If the planets were gathered in one place
Article · 3 min read
Space & the Universe
Black Holes
Sun's mass. Ours is called Sagittarius A , and it weighs about four million Suns. Astronomers
Article · 3 min read
Space & the Universe
Galaxies and the Milky Way
Sun is one of several hundred billion stars in a spiral galaxy, which is itself one of trillions
Article · 4 min read
Planets & the Solar System
Comets, Asteroids and Pluto
Sun, pushed by sunlight and the solar wind, so a comet leaving the Sun travels tail
Article · 4 min read
Matter, Energy & Physics
Gravity
Sun; it is coasting along a curve that the Sun's mass has made in spacetime
Article · 4 min read
Matter, Energy & Physics
Energy and Heat
Sun to cold space to build and maintain temporary pockets of order. Switch off the Sun
Article · 4 min read
Planet Earth
Inside the Earth
Sun at the centre. No one has drilled even one percent of the way down. Stand
Article · 4 min read
Planet Earth
Weather and Climate
Sun heating a spinning, watery planet unevenly. Nothing in daily life is discussed more and understood
Article · 4 min read
Life & Biology
Ecosystems and Food Webs
Sun flows through plants, grazers and predators, and the whole web can unravel when one thread
Article · 4 min read
Planets & the Solar System
The Moon
Sun and about 400 times closer, so the two appear almost exactly the same size in our sky. When
Article · 4 min read
Space & the Universe
Exoplanets: Worlds Around Other Stars
Sun, completing a year in a few days, with daysides hot enough to vaporise iron. Nobody
Article · 3 min read
Space & the Universe
Nebulae
Sun and its planets were born in a cloud like this 4.6 billion years ago. The brightest
Article · 3 min read
Planets & the Solar System
Uranus and Neptune
Sun shrinks to a brilliant star and the light grows feeble. Out here, twenty and thirty
Article · 4 min read
Matter, Energy & Physics
Light
Sun emits most strongly and the atmosphere lets through, and nothing more. Particles In 1905 Einstein
Article · 4 min read
Animals
Animal Migration
Sun, the stars, the Earth's magnetism and memory. Here is how, and why. Every autumn
Article · 4 min read
Space & the Universe
Dark Matter and Dark Energy
Sun move more slowly, because the Sun's pull weakens with distance. Galaxies should behave the same
Article · 3 min read
Planets & the Solar System
Mars
Sun, orbiting about one and a half times farther out than Earth. It is small, about
Article · 4 min read
Planet Earth
The Oceans
Sun. Similar vents on icy moons like Europa and Enceladus are now prime targets in the search
Article · 4 min read
Planet Earth
The Atmosphere
Sun's ultraviolet light, the radiation that causes sunburn and skin cancer and would otherwise sterilise
Article · 4 min read
Matter, Energy & Physics
The Quantum World
Sun shines: protons in the solar core are not hot enough to overcome their mutual repulsion
Article · 4 min read
The Human Body
Skin, Hair and Nails
Sun and protects the cells beneath from damage. Everyone has about the same number of pigment
Article · 3 min read
Plants & Fungi
Photosynthesis: How Plants Eat Light
Sun's energy enters the living world. Every animal eats plants or eats animals that ate plants
Article · 3 min read
Animals
Reptiles and Amphibians
sun and cool down in the shade. The cost is that they are sluggish in the cold
Article · 3 min read
Chemistry
Chemical Reactions
Sun's energy in the bonds of sugar. Even reactions that release energy usually need a push
Article · 3 min read
Animals
Birds
Sun by day and the stars by night, read the magnetic field, follow coastlines and rivers
Article · 3 min read
Matter, Energy & Physics
Electricity and Magnetism
Sun's surface. The force between charges is enormous. It is what holds atoms together and makes
Article · 4 min read
Matter, Energy & Physics
Atoms
Sun and every star. Protons and neutrons are not the end of the story either. Each
Article · 4 min read
Life & Biology
Dinosaurs and Mass Extinctions
Sun for months or years. Photosynthesis collapsed, temperatures plunged, and the food chains that depended on plants
Article · 3 min read
The Human Body
The Senses
Sight, hearing, smell, taste and touch are the body's instruments for turning light, vibration and
Article · 4 min read
The Human Body
The Brain
A kilo and a half of soft tissue containing 86 billion neurons and more connections than
Article · 4 min read
