Definitions, images and pronunciation for almost everything in celestial bodies, astronomical observations and astronautics.
The Universe, the galaxies, the stars, the Solar System, and more.
20 things you probably didn't know about living in space.
Exploring the Universe
An historic timeline of Mankind's awareness and discovery of other planets. A most excellent resource by NASA.
2009 was the 40th anniversary of the first lunar landing. This superb website was set up to commemorate that historic event. The mission is recreated in precise detail right from pre-launch with actual voiceovers. You can change the views and also click on hotspots to view related media galleries. The site is divided into 11 sections where you can watch photos, videos, and other archival content.
Google Earth Tour that describes the landing, moon walks, and the return to space of Apollo 11 with excellent visual aids and great narrations.
Don't forget to check the links to the Apollo 11 and Apollo 13 missions.
A look back at the top 10 American space missions that didn't make it.
A great collection of 32 high quality photos of the IIS, compiled for its tenth birthday.
Nine maps, the first one showing the nearest stars. The others slowly expand out until we have reached the scale of the entire visible Universe.
A classic movie that shows the amazingly huge size of the Universe parting from a small square one metre long.
A collection of 25 high quality photos of the Universe from the amazing Hubble Space Telescope.
25 commented photographs, some old, some new, to celebrate the traditional western Christmas Season.
Third annual Hubble Space Telescope imagery Advent Calendar, with 25 new stunning photos.
Some of the most important and famous images taken by the Hubble explained in detail. Visiting this site is a must.
The entire collection of the images taken by the Hubble classified in categories.
Ongoing project that features a high resolution sky map with celestial objects that are outside our solar system mapped out.
Stars, Galaxies, Nebulas and Constellations
Visualize an animation that shows how the night sky changes along the year at Exploring Earth online book.
Simulated planetarium that allows you to observe stars, constellations and planets from any specific location.
360-degree panoramic image, covering the whole of the vault of heaven.
Animation showing the processes that take place at the end of the life of a high mass star.
The red supergiant star Betelgeuse is getting ready to go supernova, and when it does Earth will have a front-row seat.
The Solar System
Fly around the Solar System's planets and explore the constellations in 3D and real time with this excellent interactive model.
Visualize an animation showing the origin of the Solar System from a nebula at Exploring Earth online book.
Wikipedia's Wikijunior online book on the Solar System. Comprehensive, aimed to kids, but still unfinished.
Wikipedia's article on the Solar System. Very up to date.
Full information on the Solar System offered by the scientists from the NASA.
Collected here are 32 images gathered from around our solar system, at scales ranging from mere centimeters to millions of kilometers.
Images of the Solar System bodies taken by the NASA missions.
Some of the most intriguing facts in our stellar system.
Sun's structure, energy and influence on the Earth.
Beautiful photo taken by astrophotographer Alan Friedman that shows sunspots, giant convection cells and prominences silhouetted against the sky.
A collection of some of the most amazing photos ever taken of our star.
Amazing animation showing the movements of the planets from different perspectives.
Sensational images of Saturn showing the ringed planet in incredible detail.
During the equinox, the sunlight casts long shadows across Saturn's rings, highlighting previously known phenomena and revealing a few never-before seen images.
A wonderful selection of some of the best martian images ever made.
Stunning satellite images of the Red Planet reveal avalanches, sand dunes and more.
Landing on Mars is an inevitability. This website simulates a tour through the Martian landscape and a human colonized habitat. The walkthrough is a lesson in the science, technology, and design challenges that will be required to land man on the Red Planet.
Visualize an animation that demonstrates that the Earth rotates around itself at Exploring Earth online book.
Visualize an animation that shows how the Earth rotates around itself at Exploring Earth online book.
A great series of activities to learn why and where it is daytime or night-time in any given moment.
Want to know how the Earth looks like right now?
Visualize an animation showing how the Earth revolves around the Sun at Exploring Earth online book.
Learn how the relative position of the Earth to the Sun conditions the climate and the daylength.
Observe the Earth's maps of temperatures, volcanoes, earthquakes, water vapor and more, at Exploring Earth online book.
Visualize the Earth system as a set of four overlapping and interacting spheres, at Exploring Earth online book.
A great series of activities to study how the four spheres of the Earth interact, at Exploring Earth online book.
Fantastic article that unravels some of the most significant facts about our planet... or did you already know that the Everest is not the biggest mountain?
The geoid is the Earth depicted according to the gravty of its surface. ESA's GOCE satellite shows it with an unprecedented accuracy.
Those were the great news more than 2,200 years ago. They took a time to spread around the globe, though.
If you are interested in the Moon or the Apollo landings, Google currently has a wonderful educational tool regarding the Moon that will interest everyone.
Videos, images and lots of info to learn almost everything about our only natural satellite.
The phases of the Moon explained through diagrams.
Images of the Moon taken by the NASA missions.
Taken by the Apollo 12 crew, in the second manned mission to the Moon ever.
Taken by the Apollo 17 crew just a few days before the man left the Moon for the last time.