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2011年4月15日星期五

9. April fireball

In my watch I've seen quite a few meteors, fireballs and bolides the sky time. The truly remarkable are few and far between, but last Saturday, I caught one which was among the most interesting I've seen. It was a slow moving, bright green one with a beautiful smoke trail, which was just as bright as Venus from where I saw it in the suburbs of St. Louis. I tweeted about it briefly, but think a response from someone else who saw it along with a link to a collection of observations about it until I, not much more. The observation for me was so beautiful, it was nothing compared to the view that got some others.

Heading of the American meteor society page for a Meteor looks at this time, it out like a Meteor suitable that I saw a pretty good number of reports from all over the country generated. Several have similar as my initial reactions: this must be a firework display. Many reports confirm the smoke trail and fragmentation as well. But the reports that are are really fantastic to those from Canada.

Most Lunar meteorite Hunter blog have several reports were collected. Some of these reports from various locations in Ontario reports of Meteor is as bright as a full moon and the entire sky light up! One also notes, that she could be a thirsty noise to hear a rare phenomenon occurs as soon as the passage through the atmosphere creates an ionized path the physical vibrations in the air around the viewer have can create radio waves, interacts with the Earth's magnetic field. A further comment reported a sonic boom at the same time (although sonic boom would occur even after the Meteor due to the slow nature of sound waves, was visible as the delay between the lightning and Thunder).

It looks not like NASA's all sky fireball network caught this fireball, but an amateur Observatory equipped with a catch all sky camera for detecting fireballs the event.

The green color for such meteors is unusual but not unprecedented. The presence of magnesium ions is responsible for this color. It is interesting to note that an other famous Meteor the Meteor also had a green tint Peekskill and compete for the full moon in brightness. This Meteor was famous, since it in at least sixteen videos (here is a show the green hue) as damage to survive intact to the ground and a car was recorded independently.

Meteors of this intensity are relatively rare but bright fireballs like this seem peaks around the vernal equinox. In the weeks around this day she such events increases about 10-30%.

Tagged as: meteors

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2011年4月9日星期六

Global Lunar Week - April 10-16, 2011

Lunar week logo courtesy of astronomers without borders

In 2009 hundreds of thousands of people one way or another participated with the international year of astronomy, and there is no reason to let die the excitement! Astronomers without borders celebrate the month of April as global astronomy month and one of the priorities is only three days of arrival… Global Lunar Week!

"A week long series of programs, from April 10 to 16, is to the Moon during global astronomy month people of our closest companion in space." "rediscover are dedicated to," says AWB. "Lunar week takes place while the Moon for the observation in the evening sky." "As the moon phases and positions change during its orbit around the Earth, it is the Moon of telescope and naked eye, educational programs, to watch online observing, competitions and a celebration of the Moon in different cultures Moon theme of star parties."

Astronomers without borders has a theme - a people * a sky. For all those, the universe today read, we quickly identify friends from different countries such as astronomy, cultures and different time zones can merge. Is it not wonderful if we could observe all together?

The dream come true…

Sander Klieverik of AstronomyLive works with telescopes around the world to celebrate global Lunar Week and bring the view directly to you.

"The week begins with a stunning programme of the historic Chamberlin Observatory of the University of Denver, with the help of Prof. R. Stencel)." "It April 9th between 7-10 pm local time (Denver), starts that 01-04 is GMT April 10th."says Sander. "Our goal is to so many telescopes points as possible on the moon to get." "I hope that there is a continuous view of the Moon anywhere from around the world all week."

How can you participate? It's easy! Simply tune into the website AstronomyLive and follow the instructions. "During the Lunar Week, AstronomyLive at least two programmes, currently calculated 15 and April 16." "will be hosting" has Klieverik. "The first broadcast, on a trip over the 85% illuminated surface, on the hunt for the most beautiful craters during this phase, take ′ crater hunt ′ lunar you." The crater to the terminator get special attention, the dark side of the Moon, which changes during the moon phase. Please know that you can see a LIVE view of the Moon and not some Moon photo. That makes the same "Apollo hop".

Come one, come all... Lunatics are welcome!


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2011年4月3日星期日

April Fool's day? No Foolin' …

Mariner 10

If you fell victim an April Fool's Day prank, then consider that some can play on the ironic jokes of all life. 1. April 2011 the mercury MESSENGER was of some of his first pictures of mercury if accidentally the fully Unexpected… of the old Mariner 10 captured you.

After the NASA press release, the first reaction was some in the MESSENGER team, that the feature on the left side of mercury must be an imaging artifact limbs. "It is the effect of solar neutrinos on the WAC CCD," said project scientist Mack Knott. The imaging team was skeptical about this statement, however, and could add all Knott was to understand Feynman diagrams "I could tell you, but you would need."

The imaging team brought back the anomalous image of the attention of the mission system engineer E. Finn, immediately called an emergency meeting of collision avoidance Review Board. Fortunately appeared not in the direct path of courier's next few orbits contain the unusual object in the image, but the fact that the object prevented previous and subsequent images of the same scene a determination of the Central curve.

One of the MESSENGER science team members, Prof. S. t. Rome, recognized the object as Mariner 10, which have visited only probe before MESSENGER to mercury. 10 Of mercury was Mariner 1973 launched three times in 1974 and 1975 before communication with the probe was lost. Prof. Rome is the only member of the MESSENGER team science team Mariner 10 and served.

The science operations center was filled with MESSENGER team members at the time, and everyone went at once to theorize why of Mariner 10 in a MDI image of mercury to be displayed. Mission design lead Mick Adams quickly calculated that 10 not mercury should be Mariner encounter to this day. "Mariner 10 and mercury were in a resonant State of the spacecraft by the planet Mercury every two years brought." "By my calculation that representation is 23 days early."

Guidance and control lead E. C. Shaughn offered that the effect of solar radiation much Mariner 10 orbit should have changed in the last 36 years as a result of the solar sailing. Propulsion lead Brecht Engel added that after Mariner energetic maneuvers degassing may have some remaining propellant 10 last, and that several outgassing events can also become the guiding curve changes have contributed.

Messenger navigation team members, from which all Williams named were, plugged these proposals in their code. Minutes later could they all mounted announce that 10 appeared Mariner point to be in a new resonant State, a synchronous with Earth. The ancient spacecraft is locked in an orbit that it swings by mercury of once each Earth year, on 1 April.

It is not a joke as a cosmic!

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington. And also thanks to H. Levenson!


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April 1, Google Japan 29 Doodle 4 Google Japan remember regional contest works the national spirit and the come celebrate April Fool's day

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April 3, 119 Google Memorial ice cream inventions week year

April 3, 119 Google Memorial ice cream inventions week year
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On 2 April YouTube celebrate April Fool's day


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2011年3月31日星期四

Yankees Bracing for Cold in Opener and in April

在 ServiceModel 客户端配置部分中,找不到引用协定“TranslatorService.LanguageService”的默认终结点元素。这可能是因为未找到应用程序的配置文件,或者是因为客户端元素中找不到与此协定匹配的终结点元素。
在 ServiceModel 客户端配置部分中,找不到引用协定“TranslatorService.LanguageService”的默认终结点元素。这可能是因为未找到应用程序的配置文件,或者是因为客户端元素中找不到与此协定匹配的终结点元素。

It sounded like a complaint — well, it was, actually — but then Swisher, who is probably the Yankees’ leading enthusiast about life in general, grinned. “But hey, no better place than the Bronx, man.”

March is not going out quite as lamblike as the adage would have it, which makes the prospect of opening day in New York just a tad less idyllic than one might hope. When the Yankees face the Tigers on Thursday afternoon, the occasion is likely to be chilly, with temperatures in the 40s, and possibly very wet, with rain in the forecast.

As both teams ran through perfunctory workouts Wednesday, the Yankees made the unsurprising announcement that Brett Gardner would lead off and Derek Jeter would bat second against the Tigers right-hander Justin Verlander, though Jeter will lead off against lefties. Luis Ayala, the former Met, will take the final bullpen slot to start the season, replacing Pedro Feliciano, another former Met, who is on the disabled list. And it was still uncertain whether Curtis Granderson, recuperating from an injury to an oblique muscle, would start in center field.

Also, A. J. Burnett has a nasty head cold. “Don’t get too close to me, man,” he warned at one point.

Without a lot to discuss, talk naturally, or perhaps with a little prompting, turned toward the weather, long underwear, insulated batting gloves and sitting near the heaters on the bench. Asked how he prepared for playing in the cold, Jeter laughed.

“More clothes, man,” he said.

The idea of playing in a chilly rain did not excite Mark Teixeira. The good thing, he said, was that both teams have to play in it.

“But anyone who’s ever played golf when it’s raining and windy, you take it inside and play cards in the clubhouse,” Teixeira said, adding that cold weather is much tougher on hitters than pitchers. “The ball doesn’t carry as well, you’re not going to be as loose, and every time you hit the ball off the end of the bat you feel like your hands are broken.”

Teixeira and his teammates may have to get used to it. The forecast for the next several days does not call for much higher temperatures, and the team’s quirky early-season schedule is frontloaded with home games. Twelve of the Yankees’ first 15 games are in the Bronx, the only interruption being a weekend series in a potentially chillier clime: Boston.

Through May 1, only 8 of the team’s first 28 games are on the road, and the 20 home games equal the number the Yankees are scheduled to play in August and September combined.

Manager Joe Girardi said that so many late-season away games did not matter much — “Our club in the past has played well on the road, so that’s not a huge concern,” he said — but the early-season home games can create a problem if weather forces many cancellations.

Swisher raised an eyebrow over the schedule.

“We’re home the whole month of April, but then we have, like, nine home games in August?” Swisher said with an incredulous shrug. “Why would you do that? Why would you not start us off in warmer climates, and then once the Midwest and the East start warming up, play us there. Send us out west, send us down south, send us anywhere. But you’re going to put us here for a whole month?”

The main difficulty for pitchers in the cold is maintaining a feel for the ball, so it does not begin to feel slippery, in Swisher’s phrase, “like a cue ball.”

Phil Hughes, who will start the third game of the season on Sunday, acknowledged that the cold could be a factor in his using the pitch he worked hardest on in spring training: the changeup.

“The first week of the season the adrenaline warms you up a little,” he said, “but it is a feel pitch, and if you can’t feel the baseball as well as you can in warm weather, it might be affected. That’s what these next couple of days are for, to get used to it, and hopefully by Sunday I’ll be all right.”

Cue ball effect aside, generally the players seem to regard cold weather as a boon for pitchers as opposed to hitters.

“Definitely pitchers,” Jeter said, “because pitchers are always moving.”

Joba Chamberlain, the Yankees reliever, agreed.

“Pitchers, we dictate everything that’s going on,” he said. “You can get in on people’s hands.”

He also made the point that before a pitcher enters the game, he warms up. “Even when it’s cold you’re working up a sweat,” he said. “We get hot just to come in.” Both starting pitchers, Verlander and the Yankees’ C. C. Sabathia, responded the same way — with a smile and a four-word sentence — when asked about playing in the cold. “Hitters don’t like it,” they said.

Sabathia, the former Cleveland Indian, added: “I’m used to it, from pitching in Cleveland. I kind of like it.”

Jeter said his least favorite of the elements was wind. “Windy is the toughest,” he said. “Wind makes it colder, plus you’ve got to throw into the wind, and hit into the wind. Wind complicates things.”

Russell Martin, beginning his first season with the Yankees after playing in relatively sunny Los Angeles, said nobody had an advantage in the cold. It was bad for both the hitter and pitcher, he said.

And then there was Mariano Rivera. You’d think, perhaps, that as a native Panamanian, Rivera, the Yanks’ nonpareil closer, would disdain low temperatures and say so. But asked if he preferred pitching in warm weather, what he disdained was the question.

“What I prefer or don’t prefer, it don’t matter,” he said, speaking with characteristic quietude and gravitas. “It’s not going to change anything. We’re here. Whether it’s cold or warm, we have to live with it. We’re ready.”


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