Jupiter's Moons – Facts for Kids
Jupiter has at least 67 moons. Some of them are only half a mile long, but one is bigger than the planet Mercury. Which moon has hundreds of volcanoes, and which one has a deep ocean under an icy surface? Find out here.
Voyager 1 – Gas Giants and a Last Look Homeward
When a rare planetary alignment opened up the outer Solar System, Voyager 1 was sent forth. It observed the gas giants Jupiter and Saturn and their moons. At nearly 4 billion miles from the Sun, the probe turned and took one last picture of home before continuing its journey to the stars.
Packing for Mars - book review
If you think being an astronaut is a glamorous occupation, Mary Roach's book “Packing for Mars” will bring you down to Earth. Playing in free-fall looks like fun, but without gravity, eating, hygiene and dealing with waste are not fun. Here's the lowdown. Still want to go to Mars?
For six months, each day has been shorter than the last, the Sun lower in the sky. Will it disappear altogether and leave the people bereft in the dark cold winter? The winter solstice is the shortest day of the year and is associated with more festivals than any other astronomical event.
Astronomy Presents - for Kids
Birthdays, Christmas, and other special occasions . . . What might please a young astronaut or astronomer? Here is a varied list of suggestions - and you may be surprised to find that a telescope is very low on the list.
Absolute Beginners - Winter Skies
Many bright stars sparkle in the sky on crisp winter evenings. Brightest of all is Sirius the Dog Star, the face of one of the two dogs of Orion the hunter. The belt of Orion himself is an easily-identified feature and the constellation also has both a red supergiant star and a blue one.
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