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Latest Astronomical transit Stories

300933ffb619bcaf9a8385d35627c4401
2009-03-17 10:50:00

On February 24, 2009, the NASA/ESA Hubble Space Telescope captured a photo sequence of four moons of Saturn passing in front of their parent planet. The moons, from far left to right, are the white icy moons Enceladus and Dione, the large orange moon Titan, and icy Mimas. Due to the angle of the Sun, they are each preceded by their own shadow. These rare moon transits only happen when the tilt of Saturn's ring plane is nearly "edge on" as seen from the Earth. Saturn's rings will be...

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2009-02-24 09:00:00

Something is about to happen on Saturn that's so pretty, even Hubble will pause to take a look. "On Feb. 24th, there's going to be a quadruple transit of Saturn's moons," says Keith Noll of the Hubble Space Telescope Science Institute. "Titan, Mimas, Dione and Enceladus will pass directly in front of Saturn and we'll see their silhouettes crossing Saturn's cloudtops"”all four at the same time." Hubble won't be the only one looking. Amateur astronomers will be able to see it, too. The...

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2009-01-20 09:35:00

Astronomers at the Harvard-Smithsonian Center for Astrophysics have discovered a planet somewhat larger and more massive than Neptune orbiting a star 120 light-years from Earth. While Neptune has a diameter 3.8 times that of Earth and a mass 17 times Earth's, the new world (named HAT-P-11b) is 4.7 times the size of Earth and has 25 Earth masses. HAT-P-11b was discovered because it passes directly in front of (transits) its parent star, thereby blocking about 0.4 percent of the star's light....

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2008-12-11 10:50:00

A team of astronomers led by John Johnson of the University of Hawaii's Institute for Astronomy has used a new technique to measure the precise size of a planet around a distant star. They used a camera so sensitive that it could detect the passage of a moth in front of a lit window from a distance of 1,000 miles. The camera, mounted on the UH 2.2-meter telescope on Mauna Kea, measures the small decrease in brightness that occurs when a planet passes in front of its star along the...

2008-08-14 16:41:06

Each evening, I go outside and look overhead at the Summer Triangle: three bright stars high above my home in California. Then I dream about what will happen when we find another Earth, a habitable planet around a distant sun. In less than a year, the first actual observations to make this dream come true will be underway with NASA's Kepler mission. Kepler is NASA's first mission capable of finding Earth-size and smaller planets in the habitable zone of distant stars. The Kepler...

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2007-03-13 09:55:00

NASA's STEREO-B spacecraft was about a million miles from Earth last month when it photographed the Moon passing in front of the sun. The resulting movie looks like it came from an alien solar system. NASA -- When scientists announce they're about to calibrate their instruments, science writers normally put away their pens. It's hard to write a good story about calibration. This may be the exception: On Feb. 25, 2007, NASA scientists were calibrating some cameras aboard the STEREO-B...

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2006-11-14 10:25:00

The launch of COROT on December 21, 2006 is a long awaited event in the quest to find planets beyond our Solar System. Searching from above the Earth's atmosphere, COROT "“ the CNES project with ESA participation - will be the first space mission specifically dedicated to the search for extrasolar planets. COROT is expected to greatly enlarge the number of known exoplanets during its two-year mission and provide the first detection of rocky planets, perhaps just a few times the mass of...

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2006-11-08 17:05:00

On Wednesday, Mercury will pass directly between the Sun and the Earth. The innermost planet will be seen not as a bright point in the sky but as a tiny black dot, silhouetted against the brilliant surface of the Sun. Although this spectacle is not visible from Europe, the ESA-NASA solar satellite SOHO will be watching. Such a crossing is known as a transit. From Earth's vantage point, only Mercury and Venus transit the Sun, because these are the only planets inside Earth's orbit. In the...

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2006-11-08 00:05:00

Mark your calendar: On Wednesday, Nov 8th, the planet Mercury will pass directly in front the Sun. The transit begins at 2:12 pm EST (11:12 am PST) and lasts for almost five hours. Good views can be had from the Americas, Hawaii, Australia and all along the Pacific Rim: visibility map. What will it look like? A picture is worth a thousand words: During the transit, Mercury's tiny disk"”jet black and perfectly round"”will glide slowly across the face of the Sun. Only a speck of the...

dfe506bd533683270b107f8c734497d8
2006-11-02 15:10:00

Scientists from Williams College and the University of Arizona will observe Mercury in front of Venus from vantage points on earthbound mountains and with orbiting spacecraft on Wednesday. Nov. 8. Jay Pasachoff of Williams College (Williamstown, Massachusetts) and Glenn Schneider of the Steward Observatory of the University of Arizona (Tucson, Arizona) will be perched at the University of Hawaii's solar observatory, at the rim of the giant Haleakala crater at an altitude of 10,000 feet on the...


Latest Astronomical transit Reference Libraries

7_9ed77167bb9b6f0379e955473d8eead32
2004-10-19 04:45:43

Positional Astronomy -- Positional astronomy is the study of the positions of celestial objects. This is the oldest branch of astronomy and dates back to antiquity. Observations of celestial objects are important for religious and astrological purposes, as well as for timekeeping. Ancient structures associated with positional astronomy include: -- Chichn Itz -- The Medicine Wheel -- The Pyramids -- Stonehenge -- The Temple of the Sun The unaided human eye can...

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Word of the Day
reremouse
  • A bat.
The word 'reremouse' comes from Middle English reremous, from Old English hrēremūs, hrērmūs ("bat"), equivalent to rear (“to move, shake, stir”) +‎ mouse.
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