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The Constellations ~ Online since 1996 and still regularly updated, this site is the product of one man’s enthusiasm for astronomy and his eagerness to share his knowledge with the world. Of particular interest is the constellations table, which offers a detailed but user-friendly look at what lies in the zodiac belt and also beyond, mainly from the angle of a fascinated amateur.
The-Moon Wiki ~ This expanding web resource aims to catalogue the features of the lunar landscape. You will find plenty of detailed information about our satellite including maps, data, photographs and links to other erudite studies of every peak, plain, depression and crater on the Moon’s surface. These go from a minor dent, to the South Pole-Aitken basin at 2,500 km across…
The Nine Planets ~ A multimedia tour of the solar system. Quite simply one of the best astronomy sites you will find. Detailed, accurate, well presented and very readable. Need to know more about those planets whose effects we’re always considering as astrologers? Look no further than Bill Arnett’s site, it’s definitely an Internet institution!
The Planetary Society ~ Founded by Carl Sagan and friends, this is a non-profit-making organisation dedicated to the further exploration of space and then telling everybody about it all. Their site is a great source of information on all matters astronomical, such as the latest rumour that in August 2007 Mars will seem the size of the full moon…
The SunTracker ~ This program is part of Diduknow.info, a user-friendly gateway to the treasures of National Museums Liverpool. In the section covering space, time and sundials you’ll find the Suntracker, enabling you to simulate the passage of the Sun across the sky, from rise to set and from any location anywhere in the world.
The Woman Astronomer ~ Anyone who has studied astrology will tell you about the overwhelming numbers of female students compared with their male counterparts. Female astronomers are a rarer breed and this site celebrates their achievements, with biographies of those who have made a name for themselves and links to help you find out more.
Titan ~ This is the second in a short series highlighting a few notable moons of our Solar System. Remember the big difference: a moon orbits a planet, while a planet circles the Sun, or any other star. Titan is Saturn’s largest moon and weighs in at 6% larger than Mercury. A probe landed here successfully in 2005, the furthest from Earth our spacecraft have so far touched down.
Titania ~ Titania is the largest Uranian moon, with an estimated diameter of 1,578 km. Scientists say it is formed from rocks and ice, with impact craters over two hundred miles across. As an obscure and remote destination, there’s little wonder astrologers haven’t taken to it. Perhaps when you’ve reached the limits of your world view, any other factor puts you over the edge?
Tonight’s Sky ~ The York County Astronomical Society is based in Pennsylvania, USA. As a part of their mission to inform and educate they offer this synopsis of what makes good viewing each month, for astronomers old and new. Aimed at a North American audience, these insights are readily adapted to other locations. The sky is not a painting, it’s a movie they explain…
Torino Scale ~ The Torino Scale ranks the impact hazard of various comets and asteroids, together with the seriousness of collision predictions, by combining probabilities and known damage potentials. Level 3 is worrying, at Level 10 you may not get home for lunch. You’ll be relieved to hear at present, Level 1 is the highest that is currently assigned.
Total Lunar Eclipse - Live Webcast ~ The total lunar eclipse of April 15, 2014 was best seen from North America. Most of the world caught a glimpse, but to witness the main event, watch this live webcast from Arizona, with totality lasting just under 78 minutes. Since 2003, Slooh has connected land-based telescopes to the Internet, for access by people around the world…
Transit Of Mercury ~ Much was made about the 2016 transit of Mercury across the face of the Sun, even though in astrological terms, it had no exceptional implications. Such an event last occurred ten years ago and the next is just three years away. The entire transit took 7½ hours, but the time-lapse version lasts two minutes thanks to the Solar Dynamics Observatory.
Trans-Neptunian Objects ~ Does the new universe have you in a spin? Do you long for a time when there were only five known planets? Don’t know your plutino from your cubewano, your Oort cloud from your Kuiper belt, or your mesoplanet from your scattered disk? Never fear, Wikipedia is here, with links explaining all of these technical terms.
TrES-2b ~ TrES-2b, aka the Coal Planet, is the darkest extrasolar planet so far discovered. It orbits the yellow sun-like star GSC 03549-02811, around 750 light years away and reflects less than 1% of the light that hits it, making it darker than coal or black acrylic paint. It is a gas giant rather larger than Jupiter, but it is very hot and emits a faint red glow, like a burning ember…
Triton ~ After the four Galilean moons of Jupiter, Saturn’s Titan and our own companion satellite, Triton is the seventh largest moon in our Solar System. It is unusual in several ways, not least because it orbits Neptune and is the only large moon to move retrograde around its focal planet. Triton is extremely cold, thus much of its surface is coated with frozen Nitrogen.
Twilight Times ~ We have talked about twilight before. It is a complicated concept that covers the transition from night to day and vice versa, technically defined by the distance of the Sun below the horizon. Astronomical twilight is imperceptible to most folk. The sky’s luminance increases in nautical twilight; then civil twilight is the interface between dawn or dusk and a visible Sun…