space-exploration

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The Trouble With Trash
It's been 53 years and over 4,500 launches since the dawn of the space age, and Earth's orbit is a junkyard. Our orbit is littered with spent rocket stages, lens caps, broken-up satellites, frozen urine, the odd glove, bits of foil, and the tool kit dropped by astronaut Heide Stefanyshyn-Piper during a spacewalk in 2008. You name it; the low Earth orbit has probably got it.

Millions of pieces of this space debris orbit the globe at break-neck speeds, and the spacecraft that pass through orbit are in jeopardy from even the smallest objects. But while the problem is evident, the solution remains elusive. Will Earth's orbit forever resemble a scene from WALL-E? Many scientists have now turned their attention to cleaning up the clutter.

Every satellite that goes up to orbit is the pride and joy of some company, lab, or nation. But once it has outlived its purpose, it's nothing but junk.  read more »

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Exactly once in a Blue Moon.

How often does a full moon occur twice in a single month? Exactly once in a Blue Moon. In fact, the modern usage of the term "Blue Moon" refers to the second Full Moon in a single month. Tonight's Blue Moon will be the first since November 2001. A Blue Moon typically occurs every few years. The reason for the rarity of the Blue Moon is that the 29.53 days between full moons is just slightly shorter than the number of days in the average month. Don't, however, expect the moon to look blue tonight! The term "Blue Moon" has recently been traced to an error in a magazine article in 1946. It is possible for the Moon to appear tinged by a blue hue, sometimes caused by fine dirt circulating in the Earth's atmosphere, possibly from a volcanic explosion. The above picture was taken not during a full moon but through a morning sky that appeared dark blue. The bright crescent is the only part directly exposed to sunlight - the rest of the Moon glows from sunlight reflected from the Earth. In this dramatic photo, however, the planet Jupiter is also visible along with its four largest moons.

On 2010 New Year eve: take a moment & look into the night sky  read more »

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NASA scientists have been outlining their preliminary results after crashing two unmanned spacecraft into the Moon in a bid to detect water-ice. A rocket stage slammed into the Moon's south pole at 1231 BST (0731 EDT) Oct. 9, 2009. Another craft followed just behind, looking for signs of water in debris kicked up by the first collision.

The argument that the moon is a dry, desolate place no longer holds water. Secrets the moon has been holding, for perhaps billions of years, are now being revealed to the delight of scientists and space enthusiasts alike.

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The longest total solar eclipse of the 21st century was visible in a 155 miles corridor as it traveled half the globe and passed through the world's two most populous nations, India and China. The eclipse began at 5:28am local time (2358 GMT) in India and lasted up to a maximum of 6 minutes and 39 seconds when it hit the Pacific Ocean. Total eclipses are caused when the moon moves directly between the sun and the Earth, covering it completely to cast a shadow on Earth. Wednesday's was the longest since July 11, 1991, when a total eclipse lasting six minutes and 53 seconds was visible from Hawaii to South America. There will not be a longer eclipse until 2132.  read more »

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*update*
Moon trees are trees grown from 500 seeds taken into orbit around the Moon by Stuart Roosa, the Command Module Pilot on the Apollo 14 mission in 1971.

July 20, 1969 saw the first human footsteps on the moon. John F. Kennedy remarked, "we choose to go to the moon in this decade and do the other things, not only because they are easy, but because they are hard." Apollo 8 astronaut Bill Anders, after he snapped the historic Earthrise photo on December 1968, said, "we came all this way to explore the moon and the most important thing is that we discovered the Earth." Apollo 14 astronaut Stuart Roosa, a former U.S. Forest Service smoke jumper, took with him tree seeds from a Loblolly Pine, Sycamore, Sweet Gum, Redwood, and Douglas Fir. After Roosa's return to Earth, the original seeds were germinated by the U.S. Forest Service and the result was "moon trees." Moon trees now grow in many places. A Moon Sycamore also shades Roosa's grave at Arlington National Cemetery.  read more »