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2781. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BFD9A5675-C9DD-4522-BF34-CA2AB5D9B000%7D

. The Lyrid meteor shower peaks under a dark sky before dawn April 22. With no Moon in the sky, observers with clear skies can expect to see up to 20 meteors per hour. Astronomy: Roen Kelly

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BFD9A5675-C9DD-4522-BF34-CA2AB5D9B000%7D -- 3.1 Кб -- 10.04.2016
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2782. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BFC46203E-6354-46A9-A559-6823E725B573%7D

. This image was taken by NASA's Cassini spacecraft April 14, 2012. The camera was pointing toward Enceladus at approximately 75,067 miles (120,808 kilometers) away. Credit: NASA/JPL/Space Science Institute

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BFC46203E-6354-46A9-A559-6823E725B573%7D -- 3.1 Кб -- 10.04.2016
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2783. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BECFA280D-723B-40BE-AA79-4BC1EBB1D2B3%7D

. A Type Ia supernova occurs when a white dwarf accretes material from a companion star until it exceeds the Chandrasekhar limit and explodes. By studying these exploding stars, astronomers can measure dark energy and the expansion of the universe. CfA scientists have found a way to correct for small variations in the appearance of these supernovae so that they become even better standard candles. The key is to sort the supernovae based on their color. NASA/CXC/M. Weiss

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BECFA280D-723B-40BE-AA79-4BC1EBB1D2B3%7D -- 3.7 Кб -- 10.04.2016
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2784. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BDC06B400-20EA-4C22-A672-A53CCE6B5F30%7D

. Centaurus A, also known as NGC 5128, is well-known for its dramatic dusty lanes of dark material. HubbleтАЩs new observations, using its most advanced instrument, the Wide Field Camera 3, are the most detailed ever made of this galaxy. They have been combined here in a multiwavelength image which reveals never-before-seen detail in the dusty portion of the galaxy. NASA/ESA/Hubble Heritage (STScI/AURA)-ESA/Hubble Collaboration

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BDC06B400-20EA-4C22-A672-A53CCE6B5F30%7D -- 3.7 Кб -- 10.04.2016
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2785. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BC56A66F4-91EE-4738-BFB3-CD310199B0B9%7D

. NASA's Mars Exploration Rover Opportunity is spending the seventh anniversary of its landing on Mars investigating a crater called "Santa Maria," which has a diameter about the length of a football field. Credit: NASA/JPL-Caltech/Cornell/ASU

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BC56A66F4-91EE-4738-BFB3-CD310199B0B9%7D -- 3.2 Кб -- 10.04.2016
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2786. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BB536424E-310E-42F2-85E8-75826DF22095%7D

. This image shows visible-light (left) and radio (right) images of a Seyfert galaxy pair. Kuo et al., NRAO/AUI/NSF

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BB536424E-310E-42F2-85E8-75826DF22095%7D -- 2.9 Кб -- 10.04.2016
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2787. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA6A8A7C0-1CAF-48DE-A203-183A10D21E08%7D

. A fireball produced in a black-hole collision or by the collapse of a gigantic star can form jets in which protons and heavier nuclei are accelerated and shock waves produce a burst of gamma rays. The fireball model also predicts the creation of very high energy neutrinos, which ought to be detectable shortly after the gamma-ray burst becomes visible from Earth. Credit Dana Berry and NASA

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA6A8A7C0-1CAF-48DE-A203-183A10D21E08%7D -- 3.5 Кб -- 10.04.2016
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2788. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA672C505-C53A-48F7-9AD4-4C4E5200CEAB%7D

. This image was taken by NASA's Cassini spacecraft April 14, 2012. The camera was pointing toward Enceladus at approximately 115 miles (185 kilometers) away. Credit: NASA/JPL/Space Science Institute

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA672C505-C53A-48F7-9AD4-4C4E5200CEAB%7D -- 3.1 Кб -- 10.04.2016
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2789. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA5763FD1-9DC4-474D-BA35-7556E5A50246%7D

. The elliptical galaxy M87 is the home of several trillion stars, a supermassive black hole, and a family of 13,000 globular star clusters. It is the dominant galaxy at the center of the neighboring Virgo cluster of galaxies, which contains some 2,000 galaxies. Being in the center of the Virgo cluster, M87 may have accumulated some of its globular clusters by gravitationally pulling them from nearby dwarf galaxies that seem to be devoid of globulars today. NASA/ESA/Hubble Heritage Team (STScI/AURA)

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BA5763FD1-9DC4-474D-BA35-7556E5A50246%7D -- 3.8 Кб -- 10.04.2016
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2790. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9F0592CB-59F3-4102-99B3-3DBCD3414517%7D

. Jets can be seen streaming out of the nucleus, or main body, of Comet 103P/Hartley in this image from NASA's EPOXI mission. The nucleus is approximately 1.2 miles (2 kilometers) long and 0.25 mile (0.4 km) across at the narrow "neck." . NASA/JPL-Caltech/UMD

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9F0592CB-59F3-4102-99B3-3DBCD3414517%7D -- 3.3 Кб -- 10.04.2016
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2791. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9CCBC290-1A33-46E9-B17F-44D329A78B95%7D

. This image was taken by NASA's Cassini spacecraft April 15, 2012. The camera was pointing toward Tethys at approximately 115,714 miles (186,224 kilometers) away. Credit: NASA/JPL/Space Science Institute

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9CCBC290-1A33-46E9-B17F-44D329A78B95%7D -- 3.1 Кб -- 10.04.2016
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2792. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9855F085-AB91-48F2-B1EA-99B418BC694A%7D

. Dramatic plumes, both large and small, spray water ice out from many locations along the famed "tiger stripes" near the south pole of Saturn's moon Enceladus. The tiger stripes are fissures that spray icy particles, water vapor and organic compounds. NASA/JPL/Space Science Institute

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9855F085-AB91-48F2-B1EA-99B418BC694A%7D -- 3.3 Кб -- 10.04.2016
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2793. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9323EE5C-325D-4831-A4AF-EED1CD89551A%7D

. This image was taken by NASA's Cassini spacecraft April 14, 2012. The camera was pointing toward TETHYS at approximately 10,875 miles (17,502 kilometers) away. Credit: NASA/JPL/Space Science Institute

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B9323EE5C-325D-4831-A4AF-EED1CD89551A%7D -- 3.1 Кб -- 10.04.2016
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2794. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B7EF5083A-E00E-4CE2-BF00-8F7C1C6B5C0C%7D

. Produced by the Sloan Digital Sky Survey, this 3-D map of the distribution of galaxies shows Earth at the center, and represents each galaxy with a single point . Large astronomical surveys, such as SDSS, rely upon a model of Baryon Acoustic Oscillations to provide a cosmological тАЬstandard rulerтАЭ for determining length scale. Ohio State UniversityтАЩs Chris Orban and David Weinberg have employed Ohio Supercomputer Center resources to simplify and better characterize that BAO model. M. Blanton and SDSS

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B7EF5083A-E00E-4CE2-BF00-8F7C1C6B5C0C%7D -- 3.8 Кб -- 10.04.2016
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2795. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B703C38E4-9CAA-40AD-8103-F48B6AD4CF46%7D

. These images taken by NASA's Hubble Space Telescope show four members of the Virgo cluster of galaxies, the nearest large galaxy cluster to Earth. They are part of a survey of globular star clusters in 100 of Virgo's galaxies. The Hubble study found evidence that these globulars are more likely to form in dense areas, where star birth occurs at a rapid rate, instead of uniformly from galaxy to galaxy. NASA/ESA/E. Peng (Peking University, Beijing)

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B703C38E4-9CAA-40AD-8103-F48B6AD4CF46%7D -- 3.7 Кб -- 10.04.2016
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2796. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B58DF7793-1D0A-4901-8E45-1BC76D460A86%7D

. This Hubble Space Telescope image shows the Einstein ring of one of the SLACS gravitational lenses, with the lensed background galaxy enhanced in blue. A. Bolton (UH/IfA) for SLACS and NASA/ESA

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B58DF7793-1D0A-4901-8E45-1BC76D460A86%7D -- 3.1 Кб -- 10.04.2016
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2797. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B4B54F91A-37DA-4D71-8D80-5B6891053039%7D

. This artist's concept uses hands to illustrate the left and right-handed versions of the amino acid isovaline. NASA/Mary Pat Hrybyk-Keith

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B4B54F91A-37DA-4D71-8D80-5B6891053039%7D -- 3.0 Кб -- 10.04.2016
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2798. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B3EEE4BAF-7AEF-4B54-B500-9872C1587C41%7D

. This layout compares two pictures of a supernova remnant called SN 1987A тАФ the left image was taken by the Herschel Space Observatory, and the right is an enlarged view of the circled region at left, taken with NASA's Hubble Space Telescope. ESA/NASA-JPL/UCL/STScI

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B3EEE4BAF-7AEF-4B54-B500-9872C1587C41%7D -- 3.3 Кб -- 10.04.2016
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2799. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B33A80190-E9A0-4EE2-81C5-A85974688E22%7D

Swift's UVOT acquired this image of Comet C/2009 P1 (Garradd) on April 1, 2012, when the comet was 142 million miles (229 million kilometers) away, or 636 times farther than the Moon. Red shows sunlight reflected from the comet's dust; violet shows ultraviolet light produced by hydroxyl (OH), a fragment of water. NGC 2895 is a barred spiral galaxy located 400 million miles away in the constellation Ursa Major. ...

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7B33A80190-E9A0-4EE2-81C5-A85974688E22%7D -- 4.1 Кб -- 10.04.2016
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2800. http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BF3704940-AFC8-42FF-B2A6-FFB7E1B60A9B%7D

. In this artist's conception, a captured world drifts at the outer edge of a distant star system, so far from its sun-like host that the star's disk is barely resolvable at upper right. New research shows that one in 20 stars within our galaxy might have captured a free-floating planet. Credit: Christine Pulliam (CfA)

[ Сохраненная копия ] Ссылки http://www.astronomy.com/sitefiles/resources/image.aspx?item=%7BF3704940-AFC8-42FF-B2A6-FFB7E1B60A9B%7D -- 3.4 Кб -- 10.04.2016
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