Stars & Galaxies
How are stars are born in nebulae and how do they end their lives? What do we see in the sky? Galaxies are made up of vast numbers of the stars, but what are they like and how do they evolve?
Andromeda the Chained Princess
Andromeda stands in the northern sky eternally chained to her rock. She is one of the five constellations that Ptolemy described in the second century, all part of one particular ancient Greek myth. In the constellation is a quadruple star, a blue snowball, exoplanets and spiral galaxies.
Aries the Golden Ram
Aries was the winged ram from which the Golden Fleece came. Two thousand years ago his constellation marked the spring equinox when the Sun crossed the celestial equator near Beta and Gamma Arietis. The equinox is now in Pisces, but what strange object was discovered in 2007 in Aries?
Here’s a collection of astronomy jokes for kids, adults and geeks of all ages. Laughter helps to keep us young and healthy, so see if anything tickles your fancy. (And how *does* the Man in the Moon cut his hair?)
Astronomy Photographer of the Year 2012
An exquisite whirlpool of two galaxies held together by invisible bonds was this year´s winning image. And the Young Astronomy Photographer of the Year captured the beauty of the Pleiades, a cluster of hot blue stars surrounded by a delicate haze of reflective dust. A feast for the eye.
Articles about some of the 88 official constellations. What they are and where are they? And read the ancient myths and legends that tell their exciting stories.
We no longer see the heavens as perfect and the stars as eternal and unchanging. Even the Universe had a beginning, and everything that we observe changes and evolves. Many of these changes involve cosmic collisions.
Creepy Crawlies in Space
What was the first Earth creature to go into space? Not a dog, but a fruit fly. Insects and arachnids have been mini-astronauts for over sixty years. They have also inspired the naming of heavenly objects.
Galactic Winter Games
Welcome to the Galactic Winter Games, a starry tribute to Earth´s Winter Olympic Games. It´s a tour of some really cool cosmic sights – as well as some hot ones, such as one of the biggest explosions in the Universe.
Galaxy Facts for Kids
The Milky Way used to be the only galaxy people knew. Big telescopes changed that. Now we know there are billions of them. They come in different sizes and shapes and have some surprises for us.
Galaxy or Star Cluster
Galaxies and star clusters are collections of stars held together by gravity. Galaxies are really big. But how big is big? Even bigger than a million stars? Yes, a million is small in astronomy.
Lacaille´s skies – Arts
Much of the southern sky wasn´t visible to the ancient Mediterranean civilizations. Instead of representing the ancient myths, the constellations were invented long afterwards by European explorers and astronomers. Some of Abbe Lacaille´s inventions are tributes to the arts.
Lacaille´s skies – Sciences
There´s a curious set of constellations in the southern skies. They don´t represent exotic animals, heroic deeds or the foibles of ancient deities. They´re composed of dim and nameless stars. Find out why Abbe Lacaille invented them, and take a quick tour.
Milky Way - Facts for Kids
We live in the Milky Way galaxy. When we look up at the sky all the stars we see are part of the Milky Way. But did you know that most of the Galaxy is made of mysterious, invisible dark matter and that there’s an even darker secret at its heart?
Milky Way - Our Galaxy
The Milky Way is a giant spiral galaxy. Along with our neighboring giant Andromeda Galaxy, it dominates the Local Group of galaxies. But where are we in the Galaxy? Why do astronomers think that 95% of the Galaxy is mysterious dark matter? And what is lurking at the heart of the Milky Way?
Perseus the Hero
Perseus was a first-class hero: a demi-god, monster-slayer, maiden-rescuer, founder of Mycenae. When he died the gods put him in the sky. His constellation contains beautiful nebulae, a demon and a singing black hole.
Stars are born, we see their light in the sky, and they die. Find out about the patterns of stars we see, about the stars themselves and the galaxies they inhabit.
Top Astronomy Stories 2012
What were the big astronomy stories of the year 2012? Here is my choice of the top ten plus a non-story. What do you think?
Virgo the Maiden
Virgo is one of the constellations of the zodiac, and its stars have been linked to agricultural goddesses for thousands of years. This area of sky contains thousands of galaxies, dozens of known extrasolar planets, and was where the first quasar was discovered.
What Is a Galaxy
What is a galaxy? A great star system held together by gravity, with stars, gas and dust, black holes and dark matter. Astronomers used to think our Galaxy was the whole universe. But now that we know of billions of galaxies, they're considered to be the building blocks of the universe.
What is Hanny´s Voorwerp Astronomy Homepage | Editor's Picks Articles | Top Ten Articles | Astronomy Site Map
Hanny´s Voorwerp was first seen in 2007 - a strange blue blob in the constellation of Leo Minor. Since then it has been imaged by large telescopes in visible light, ultraviolet light, infrared light, radio waves and x-rays, but astronomers still don´t entirely agree about the mystery object.
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