Astronomy Picture of the Day . ... 17.04.2001 . ... Credit: Viking Project , USGS , JPL , NASA Explanation: One place where water can be found on Mars is in clouds . In the above picture colorful water clouds are visible just after sunrise in and around a maze of canyons known as Noctis Labyrinthus (the labyrinth of the night). ... April . ... April 2001 . ... Publications with keywords: Mars - clouds - water . Publications with words: Mars - clouds - water . ... Curiosity on the Move . ...

Еще в разделе: (Показать все результаты (>124379) - www.astronet.ru/ )

• Астронет > Colorful Water Clouds Over Mars
• XWare > APOD
• A Colorful Lunar Corona

... 2001 April 17 . Colorful Water Clouds Over Mars . Credit: Viking Project , USGS , JPL , NASA . Explanation: One place where water can be found on Mars is in clouds . In the above picture colorful water clouds are visible just after sunrise in and around a maze of canyons known as Noctis Labyrinthus (the labyrinth of the night). Scientists don't yet know, however, why these clouds formed , and why some stick to the canyons . ... About APOD | ... NASA Technical Rep.: ...

Еще в разделе: (Показать все результаты (>6560) - www.sai.msu.su/ )

• APOD: 2015 June 15 - A Colorful Lunar Corona
• APOD: 2016 January 11 - A Colorful Solar Corona over the Himalayas
• APOD: September 19, 1995 - The Small Cloud of Magellan

... As an experiment, I made some three-color images of Messier 42, more commonly known as the Great Nebula of Orion. ... green enhanced . ... halfsize or fullsize . ... Each image is a ``true color'' composite of three monochromatic images, in which the red, green, and blue intensities each correspond to the intensity of one of the original images. ... The HST image is assembled from different filters than mine: red is Nitrogen [II] at 6583 , green is H-alpha at 6563 , and blue is O [III] at 5007 . ...

Еще в разделе: (Показать все результаты (>3983) - www.naic.edu/ )

• What is HISA?
• The Tarantula Nebula
• The Search for HVCs in Other Galaxies

We present ~1000 new candidate Young Stellar Objects (YSOs) in the Large Magellanic Cloud selected from Spitzer Space Telescope data, as part of the Surveying the Agents of a Galaxy's Evolution (SAGE) Legacy program. ... The candidate YSOs were selected from the SAGE Point Source Catalog from regions of color-magnitude space least confused with other IR-bright populations. ... They are more clustered than generic point sources, as expected if star formation occurs in filamentary clouds or shells. ...

Еще в разделе: (Показать все результаты (>17588) - www.stsci.edu/ )

• Spitzer Sage Observations of Large Magellanic Cloud Planetary Nebulae
• Gaps in the Cloud Cover? Comparing Extinction Measures in Spiral Disks
• Dust Around Stars

... Bad Astronomy . ... Bitesize Astronomy . ... Have you ever looked at pictures of Saturn's rings and noticed what look like gaps in the rings? ... Gian Domenico Cassini discovered a large gap in Saturn's rings in 1675. Later, an astronomer named Encke discovered a smaller gap near the edge of the rings. ... It was found long ago that an orbit in the Cassini Division, as the large gap is named, has a period almost exactly one-half that of one of Saturn's moons named Mimas. ... 2008 Phil Plait. ...

Еще в разделе: (Показать все результаты (>412) - www.badastronomy.com/ )

... 14 HUBBLE FINDS MANY BRIGHT CLOUDS ON URANUS A recent Hubble Space Telescope view reveals Uranus surrounded by its four major rings and by 10 of its 17 known satellites. This false-color image was generated by Erich Karkoschka using data taken on August 8, 1998, with Hubble's Near Infrared Camera and Multi-Object Spectrometer. ... Team member Mark Marley (New Mexico State University) reports that green and blue regions show where the atmosphere is clear and sunlight can penetrate deep into Uranus. ...

Еще в разделе: (Показать все результаты (>8344) - www.arcetri.astro.it/ )

• A Search for Clustering around Herbig Ae/Be Stars
• Clouds From Space
• Arcetri Star-Formation Group Publications

Next: Rapidly Rotating Stars Up: Discussion Previous: Relations . ... They attributed this to a mechanism which regulated stellar angular momentum through the accretion disk. ... While some of this may be due to sampling effects, the data seem to indicate that after a star loses its disk, either it continues its slow rotation for a period of time and then a rapid increase in rotation rate commences or spin up does not necessarily follow the loss of the disk. ...

Еще в разделе: (Показать все результаты (>5204) - hea-www.harvard.edu/ )

• The AstroStat Slog globular cluster
• The AstroStat Slog massive data
• Chandra Images for SNR J0059.4-7210

... 2011: . Detection of galaxies with large peculiar velocities . ... New galaxies with polar rings . ... The new catalog contains 275 galaxies. ... Radio galaxy RC J0311+0507, a unique object of the early Universe . ... The estimation of the stellar population age in the host galaxy via the multicolor photometry (BTA) and new infrared data (UKIRT, 2011), amounting to 0.8 Gyr results in the moment of its formation when the universe was about 0.5 milliard years old (z~10). ... Archive . ...

Еще в разделе: (Показать все результаты (>273) - mavr.sao.ru/ )

• Galaxy sector, archive 1997

... Files in red?history) . ... Trapped Motion . ... 10a. Particle Drift . ... Fast Particles . ... The fact charged particles circle around field lines was well known to J.J. Thomson when he experimented with electron and ion beams in a magnetic field. ... The notion of adiabatic invariance is tied with the early years of quantum theory. ... By about1910, physicists realized that these patterns indicated changes in the laws of physics as one approached atomic dimensions. ...

Еще в разделе: (Показать все результаты (>1107) - www.cosmos.ru/ )

• Sunlight and the Earth
• The Polar Aurora
• Magnetism before Gilbert "

... Your main research interests concern neutral hydrogen. ... That means that there must be enormous quantities of gas lying around, waiting for the chance to collapse under its own weight into lumps and form stars and galaxies. If we could actually observe this gas, as it moves around and assembles itself into lumps, we would be directly observing the process of galaxy formation. ... Optical astronomers seem to think that they can observe galaxy formation by taking optical images. ... In galaxies. ...

Еще в разделе: (Показать все результаты (>734) - www.mso.anu.edu.au/ )

• Color-Magnitude Diagram of a Milky Way Satellite Galaxy

... Research . ... The major problem in HVC research is the unknown distance towards most of the HVCs. ... Thilker et al. (2004) used the Green Bank Telescope (GBT) to map an area of $7^{\circ} \times 7^{\circ}$ around M31 in H i . They discovered a population of HVCs located within a projected distance of about $50~\mathrm{kpc}$ from M31. ... 2004). ... The remaining HVCs around M31 are isolated in position and velocity and may represent primordial, dark-matter-dominated clouds. ...

Еще в разделе: (Показать все результаты (>11117) - www.atnf.csiro.au/ )

• Research - Compact high-velocity clouds around the Milky Way
• ATNF Colloquium
• Gain-Elevation and Opacity Corrections

Photon Scattering: Basic Principle of Photon Scattering . Audio Narration is available . No Scattering: Photon Source and Detector . ... For optical photons, scattering goes as wavelength to the -4 power. In the case of blue photons compared to red photons, this means that blue photons are about 10 times more likely to get scattered than red photons. ... Watch the blue photons scatter away from the detector . ... Interstellar dust make stars appear redder than they really are . ...

Еще в разделе: (Показать все результаты (>405) - zebu.uoregon.edu/ )

• Dark Matter in the Universe
• The Galaxy Gallery: Messier Objects
• Galaxy Gallery Page IV: The Movies

... So it s funny that the object in this new space photograph looks so much like a flame, from the white-hot centre, to the rising red clouds. ... This object is a nebula (a cloud of cosmic gas and dust) and on top of looking like a flame, it also acts like one. ... Like the scorching core of a flame, the hottest part of this nebula is the bright region at the centre where a crowd of massive young stars are hiding. ... There appears to have been many episodes of star birth within this cloud. ...

Еще в разделе: (Показать все результаты (>28530) - www.eso.org/ )

• http://www.eso.org/public/news/eso1320/kids/
• Los Cielos de Am , The darkest sky and the two galactic hemispheres
• The hidden fires of the Flame Nebula* | ESO

... Color index . ... error on color index . ... code for the first band (according to definition below) . ... code for the second band (according to definition below) . code_col . code of colour type (according to the table below) . ... quality code . ... bibliographic reference code . The coding of integer codes is given in the following tables : . Band . Definition . ... U band . ... H band 1.6mu for Aaronson system) . ... u SDSS (Sloan) . ... r SDSS (Sloan)29 i SDSS (Sloan) . ...

Еще в разделе: (Показать все результаты (>1786) - www.sao.ru/ )

• Magnitudes and Colors
• ImageIO(3)
• Mean astrophysical parameters from LEDA

... Files in red?history) . ... Trapped Motion . ... 10a. Particle Drift . ... Fast Particles . ... The fact charged particles circle around field lines was well known to J.J. Thomson when he experimented with electron and ion beams in a magnetic field. ... The notion of adiabatic invariance is tied with the early years of quantum theory. ... By about1910, physicists realized that these patterns indicated changes in the laws of physics as one approached atomic dimensions. ...

Еще в разделе: (Показать все результаты (>751) - www.iki.rssi.ru/ )

• The Polar Aurora
• The Polar Caps
• Kuiper-Oort

XMM-Newton Science Analysis System . ... Light of stars outside the telescope field of view may reach the RGS focal plane after reflections on the front side of the gratings. Optical light may also be reflected on the back surface of the gratings; before launch the exact magnitude of this effect is not known. Regions around the pointing direction from which light could be reflected on the RGS focal plane are called avoidance fields . ...

Еще в разделе: (Показать все результаты (>5023) - xmm.vilspa.esa.es/ )

• Patterns

... A wordlwide network of amateur and professional astronomers record and time the mutual eclipses and occultations of the Galilean satellites as accurately as possible. ... Already, the acceleration of Io is evident in the data and continued monitoring through this coming season will help pin down the acceleration of the other three satellites. ... From Dr Apostolos Christou, Armagh Observatory: . ... If you want to know the observing times from your location get it by filling in this form . ...

Еще в разделе: (Показать все результаты (>2647) - star.arm.ac.uk/ )

• Armagh Astropark: Comets
• Armagh Observatory
• Armagh Astropark

Astronotes Armagh Planetarium's Stellar Blog! ... Armagh Planetarium . ... Stars . ... Space Flight . ... Monthly Sky Notes . ... NGC 6357's inner star forming region glows with the emission of ionized hydrogen gas. Image credit: ESO/VVV Survey/D. Minniti. ... Located around 8000 light years away in the constellation of Scorpius , NGC 6357 (sometimes called the Lobster Nebula ) is a typical stellar nursery, filled with vast clouds of gas and tendrils of dark dust. ... Subscribe to Astronotes . ...

Еще в разделе: (Показать все результаты (>2503) - www.armaghplanet.com/ )

• Young Stars in the Small Magellanic Cloud | Astronotes
• June Night Sky | Astronotes
• Was the 21 September Fireball a Second Moon? | Astronotes

... Submitted by Ben Kleschinsky on 11/02/2013 02:18:51 . Summer Solstice Super Moon 6/23/13 . Taken on the night of the Summer Solstice around midnight June 23, 2013. ... Camera: Nikon D5100 Lens: 70-300mm ED VR . Shutter-Speed: Unknown ISO: Unknown . POST PROCESSING: . ... Logon to post a follow-up comment or review comments from others . Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

Еще в разделе: (Показать все результаты (>438) - www.atmob.org/ )

• ATMoB: Christmas Mystery

Next: Polarization efficiency: size/shape/orientation effects Up: Optical properties of cosmic Previous: The 2175? feature . To model the interstellar polarization one needs to calculate the forward-transmitted radiation for an ensemble of non-spherical aligned dust grains. ... Let non-polarized stellar radiation passes through a dusty cloud with a homogeneous magnetic field. ... The angle between the line of sight and the magnetic field is ( ). ... where the angle is connected with and ( ). ...

Еще в разделе: (Показать все результаты (>388) - www.astro.spbu.ru/ )

• Alexei Kritsuk's Home Page
• Database of Optical Properties -- Level: subpage
• Polarization efficiency: size/shape/orientation effects