Autor Tópico: APOD DO DIA  (Lida 12157 vezes)

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Offline ahlberto

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APOD DO DIA
« em: Setembro 28, 2008, 05:55:32 pm »
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« Última modificação: Junho 11, 2010, 06:19:02 pm por ahlberto »



Offline ahlberto

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Re: APOD DO DIA
« Responder #1 em: Setembro 30, 2008, 12:51:28 am »
A True Image from False Kiva
Credit & Copyright: Wally Pacholka (Astropics.com/TWAN)
Explanation: Is there any place in the world you could see a real sight like this? Yes. Pictured above is single exposure image spectacular near, far, and in between. Diving into the Earth far in the distance is part of the central band of our Milky Way Galaxy, taken with a long duration exposure. Much closer, the planet Jupiter is visible as the bright point just to band's left. Closer still are picturesque buttes and mesas of the Canyonlands National Park in Utah, USA, lit by a crescent moon. In the foreground is a cave housing a stone circle of unknown origin named False Kiva. The cave was briefly lit by flashlight during the long exposure. Astrophotographer Wally Pacholka reports that getting to the cave to take this image was no easy trek. Also, mountain lions were a concern while waiting alone in the dark for just the right exposure.
« Última modificação: Janeiro 01, 1970, 01:00:00 am por Guest »

Offline ahlberto

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Re: APOD DO DIA
« Responder #2 em: Setembro 30, 2008, 08:21:55 pm »
Planets Ahoy!
Credit & Copyright: Mike Salway (IceInSpace)
Explanation: Can you spot the Solar System's four rocky planets? In the above image taken on September 20, all of them were visible in a single glance, but some of them may be different than you think. Pictured above, the brightest and highest object in the sky is the planet Venus. The object lowest in the sky is the planet Mars, while the object furthest to the left is the planet Mercury. The last remaining point of light is . . . the bright star Spica, which leaves the question -- where is the fourth rocky planet? That would be Earth, specifically part of Australia, visible across the entire bottom of the image.
« Última modificação: Janeiro 01, 1970, 01:00:00 am por Guest »

Offline ahlberto

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Re: APOD DO DIA
« Responder #3 em: Outubro 01, 2008, 06:53:09 pm »
The First Rocket Launch from Cape Canaveral
Credit: GRIN, NASA
Explanation: A new chapter in space flight began on 1950 July with the launch of the first rocket from Cape Canaveral, Florida: the Bumper 2. Shown above, the Bumper 2 was an ambitious two-stage rocket program that topped a V-2 missile base with a WAC Corporal rocket. The upper stage was able to reach then-record altitudes of almost 400 kilometers, higher than even modern Space Shuttles fly today. Launched under the direction of the General Electric Company, the Bumper 2 was used primarily for testing rocket systems and for research on the upper atmosphere. Bumper 2 rockets carried small payloads that allowed them to measure attributes including air temperature and cosmic ray impacts. Seven years later, the Soviet Union launched Sputnik I and Sputnik II, the first satellites into Earth orbit. In response in 1958, 50 years ago today, the US created NASA.
« Última modificação: Janeiro 01, 1970, 01:00:00 am por Guest »

Offline ahlberto

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Re: APOD DO DIA
« Responder #4 em: Outubro 02, 2008, 05:19:33 pm »
NGC 253 Close-Up
Credit: NASA, ESA, J. Dalcanton, B. Williams (Univ. Washington)
Ground-based data: T. Rector (Univ. Alaska, Anchorage), T. Abbott, NOAO/AURA/NSF
Explanation: This dusty island universe is one of the brightest spiral galaxies in the sky. Seen nearly edge-on, NGC 253 lies a mere 13 million light-years away and is the largest member of the Sculptor Group of galaxies, neighbor to our own local galaxy group. The remarkably sharp, close-up view is based on data from the Hubble's Advanced Camera for Surveys (ACS). Beginning on the left near the galaxy's core, the panorama follows filaments of dust, interstellar gas, and even individual stars toward the galaxy's edge at the far right, a magnificent vista spanning nearly 50,000 light-years. The image data are part of ANGST, the ACS Nearby Galaxy Survey Treasury, a program to explore our cosmic backyard.
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Offline ahlberto

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Re: APOD DO DIA
« Responder #5 em: Outubro 03, 2008, 05:04:04 pm »
Young Suns of NGC 7129
Credit & Copyright: Bob and Janice Fera (Fera Photography)
Explanation: Young suns still lie within dusty NGC 7129, some 3,000 light-years away toward the royal constellation Cepheus. While these stars are at a relatively tender age, only about a million years old, it is likely that our own Sun formed in a similar stellar nursery some five billion years ago. Most noticeable in the striking image are the lovely bluish dust clouds that reflect the youthful starlight, but the smaller, deep red crescent shapes are also markers of energetic, young stellar objects. Known as Herbig-Haro objects, their shape and color is characteristic of glowing hydrogen gas shocked by jets streaming away from newborn stars. Ultimately the natal gas and dust in the region will be dispersed, the stars drifting apart as the loose cluster orbits the center of the Galaxy. At the estimated distance of NGC 7129, this telescopic view spans about 40 light-years.
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Re: APOD DO DIA
« Responder #6 em: Outubro 04, 2008, 03:33:38 pm »
A Solar Prominence Unfurls
Credit: STEREO Project, NASA
Explanation: On September 29, this magnificent eruptive solar prominence lifted away from the Sun's surface, unfurling into space over the course of several hours. Suspended in twisted magnetic fields, the hot plasma structure is many times the size of planet Earth and was captured in this view by the Sun-watching STEREO (Ahead) spacecraft. The image was recorded in extreme ultraviolet light emitted by ionized Helium, an element originally identified in the solar spectrum. Seen against the brilliant solar surface in visible light, such prominences appear as dark filaments because they are relatively cool. But they are bright themselves when viewed against the blackness of space, arcing above the Sun's edge.
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Re: APOD DO DIA
« Responder #7 em: Outubro 05, 2008, 10:24:34 am »
Earth at Night
Credit: C. Mayhew & R. Simmon (NASA/GSFC), NOAA/NGDC, DMSP Digital Archive
Explanation: This is what the Earth looks like at night. Can you find your favorite country or city? Surprisingly, city lights make this task quite possible. Human-made lights highlight particularly developed or populated areas of the Earth's surface, including the seaboards of Europe, the eastern United States, and Japan. Many large cities are located near rivers or oceans so that they can exchange goods cheaply by boat. Particularly dark areas include the central parts of South America, Africa, Asia, and Australia. The above image is actually a composite of hundreds of pictures made by the orbiting DMSP satellites.
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Re: APOD DO DIA
« Responder #8 em: Outubro 07, 2008, 08:30:30 am »
Layers of Red Cliffs on Mars
Credit: HiRISE, MRO, LPL (U. Arizona), NASA
Explanation: How did these layers of red cliffs form on Mars? No one is sure. The northern ice cap on Mars is nearly divided into two by a huge division named Chasma Boreale. No similar formation occurs on Earth. Pictured above, several dusty layers leading into this deep chasm are visible. Cliff faces, mostly facing left but still partly visible from above, appear dramatically red. The light areas are likely water ice. The above image spans about one kilometer near the north of Mars, and the elevation drop from right to left is over a kilometer. One hypothesis relates the formation of Chasma Boreale to underlying volcanic activity.
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Offline ahlberto

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Re: APOD DO DIA
« Responder #9 em: Outubro 07, 2008, 03:26:09 pm »
Dust Mountains in the Carina Nebula
Credit: NASA, ESA, Hubble Heritage (STScI/AURA); Acknowledgement: N. Smith et al. (JHU)
Explanation: Bright young stars sometimes sculpt picturesque dust mountains soon after being born. Created quite by accident, the energetic light and winds from these massive newborn stars burn away accumulations of dark dust and cool gas in a slow but persistent manner. Such is the case in NGC 3324, a star forming region near the edge of NGC 3372, the energetic and expansive Carina Nebula. Pictured above, in scientifically assigned colors, is only a small part of NGC 3324. The Carina Nebula itself is one of the largest star forming regions known and home to Eta Carinae, one of the most unstable and variable stars known. The above image was created from archived Hubble Space Telescope data in honor of the 10th anniversary of the Hubble Heritage Project. The Hubble Heritage Project has created, so far, nearly 130 visually stunning images.
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Re: APOD DO DIA
« Responder #10 em: Outubro 08, 2008, 03:33:24 pm »
Mercury as Revealed by MESSENGER
Credit: MESSENGER, NASA, JHU APL, CIW
Explanation: The planet Mercury has been known since history has been recorded, but parts of the Solar System's innermost planet have never been seen like this before. Two days ago the robotic MESSENGER spacecraft buzzed past Mercury for the second time and imaged terrain mapped previously only by comparatively crude radar. The above image was recorded as MESSENGER looked back 90 minutes after passing, from an altitude of about 27,000 kilometers. Visible in the above image, among many other newly imaged features, are unusually long rays that appear to run like meridians of longitude out from a young crater near the northern limb. MESSENGER is scheduled to fly past Mercury once more before firing its thrusters to enter orbit in 2011.
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Offline ahlberto

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Re: APOD DO DIA
« Responder #11 em: Outubro 09, 2008, 02:27:47 pm »
Massive Stars in NGC 6357
Credit & Copyright: Johannes Schedler (Panther Observatory)
Explanation: Massive Stars lie within NGC 6357, an expansive emission nebula complex some 8,000 light-years away in the tail of the constellation Scorpius. In fact, positioned just below center in this close-up view of NGC 6357, star cluster Pismis 24 includes some of the most massive stars known in the galaxy, stars with over 100 times the mass of the Sun. The nebula's bright central region also contains dusty pillars of molecular gas, likely hiding massive protostars from the prying eyes of optical instruments. Intricate shapes in the nebula are carved by interstellar winds and energetic radiation from the young and newly forming massive stars. This alluring telescopic view spans just under 50 light-years at the estimated distance of NGC 6357.
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Re: APOD DO DIA
« Responder #12 em: Outubro 10, 2008, 07:02:22 pm »
Irregular Galaxy NGC 55
Credit & Copyright: Robert Gendler
Explanation: Irregular galaxy NGC 55 is thought to be similar to the Large Magellanic Cloud (LMC). But while the LMC is about 180,000 light-years away and is a well known satellite of our own Milky Way Galaxy, NGC 55 is more like 6 million light-years distant and is a member of the Sculptor Galaxy Group. Classified as an irregular galaxy, in deep exposures the LMC itself resembles a barred disk galaxy. However, spanning about 50,000 light-years, NGC 55 is seen nearly edge-on, presenting a flattened, narrow profile in contrast with our face-on view of the LMC. Just as large star forming regions create emission nebulae in the LMC, NGC 55 is also seen to be producing new stars. This gorgeous galaxy portrait highlights a bright core, telltale pinkish emission regions, and young blue star clusters in NGC 55.
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Re: APOD DO DIA
« Responder #13 em: Outubro 11, 2008, 09:36:45 am »
Bright Bolide
Credit & Copyright: Howard Edin (Oklahoma City Astronomy Club)
Explanation: On September 30, a spectacular bolide or fireball meteor surprised a group of amateur astronomers enjoying dark night skies over the Oklahoma panhandle's Black Mesa State Park in the Midwestern US. Flashing past familiar constellations Taurus (top) and Orion, the extremely bright meteor was captured by a hillside camera overlooking the 2008 Okie-Tex Star Party. Astronomy enthusiast Howard Edin reports that he was looking in the opposite direction at the time, but saw the whole observing field light up and at first thought someone had turned on their car headlights. So far the sighting of a such a bright bolide meteor, produced as a space rock is vaporized hurtling through Earth's atmosphere, really is a matter of luck. But that could change. Earlier this week the discovery and follow-up tracking of tiny asteroid 2008 TC3 allowed astronomers to predict the time and location of its impact with the atmosphere. While no ground-based sightings of the fireball seem to have been reported, this first ever impact prediction was confirmed by at least some detections of an air burst and bright flash on October 7th over northern Sudan.
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Offline ahlberto

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Re: APOD DO DIA
« Responder #14 em: Outubro 12, 2008, 12:17:26 pm »
Spiral Galaxy NGC 3370 from Hubble
Credit: NASA, ESA, Hubble Heritage (STScI/AURA); Acknowledgement: A. Reiss et al. (JHU)
Explanation: Is this what our own Milky Way Galaxy looks like from far away? Similar in size and grand design to our home Galaxy (although without the central bar), spiral galaxy NGC 3370 lies about 100 million light-years away toward the constellation of the Lion (Leo). Recorded above in exquisite detail by the Hubble Space Telescope's Advanced Camera for Surveys, the big, beautiful face-on spiral is not only photogenic, but has proven sharp enough to study individual stars known as Cepheids. These pulsating stars have been used to accurately determine NGC 3370's distance. NGC 3370 was chosen for this study because in 1994 the spiral galaxy was also home to a well studied stellar explosion -- a Type Ia supernova. Combining the known distance to this standard candle supernova, based on the Cepheid measurements, with observations of supernovas at even greater distances, has helped to reveal the size and expansion rate of the entire Universe itself.
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