... 2007 June 4 . IC 4603: Reflection Nebula in Ophiuchius . ... The effect is created not by digital trickery but by large amounts of interstellar dust . ... Dense dust clouds are opaque to visible light and can completely hide background stars. ... Photographed above is roughly four square degrees of the nebula IC 4603 near the bright star Antares toward the constellation of Ophiuchus . ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ... A service of: ASD at NASA / GSFC . ...

... Главная . ... Новости . ... Проекты . Любителям астрономии . Проект ISON . ... Подробнее . ... Категория: Новости проекта ISON . ... Метки: Космический мусор ,љ Астероиды ,љ Гамма-всплески ,љ Любителям астрономии ,љ Кометы љ . ... Метки: Космический мусор ,љ Астероиды ,љ Любителям астрономии љ . ... Новости обсерваторий проекта] - Обсерватория Кубанского государственного университета от Иванов А - 09.04.2016 11:08:49 . ... 1999-2013 Copyright "Астрономия и Телескопостроение" . ...

... IC 4603: Reflection Nebula in Ophiuchius . ... The effect is created not by digital trickery but by large amounts of interstellar dust . ... Dense dust clouds are opaque to visible light and can completely hide background stars. For less dense clouds, the capacity of dust to preferentially reflect blue starlight becomes important, effectively blooming the stars blue light out and marking the surrounding dust. ... Publications with keywords: reflection nebula . ... M78 and Reflecting Dust Clouds . ...

... Bad Astronomy . ... Mad Science . ... Site Info . ... Public Talks . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Who is this guy who calls himself "The Bad Astronomer?" ... First, yes, I am a real live astronomer (when people ask me what astronomers do, I tell them "They astronom !" ... These are emitted by powerful objects like black holes, exploding stars, and super-dense neutrons stars. ... Finally, am I really a bad astronomer? ... 2008 Phil Plait. ...

... 2000 October 16 . Dust and Gas Surrounding Star R Coronae Australis . ... The dust is so thick on the upper left of the above photograph that little light from background stars comes through. Thinner dust near the stars reflects light from R Coronae Australis (upper right) and neighbor TY Coronae Australis , giving their surroundings a flowing appearance. ... The unusual structure above the center is a Herbig-Haro object, a knot of gas ejected from the star that has impacted surrounding gas. ...

... Sun . ... Our Galaxy . ... Stars . ... Artist's impression of the red dwarf star CHRX 73 A and its companion object CHRX 73 B. The companion object is around 12 Jupiter masses, and may either be a planet or a brown dwarf. ... In Astronomy-speak, red dwarfs are low-mass stars; our own Sun is 2.5 times as heavy as even the biggest red dwarf. ... In our galaxy, the Milky Way, red dwarfs are the most common type of star . ... Tweets that mention Red dwarfs: The most important stars in the Universe | ...

Definitions of Magnitudes and Surface Brightness 1 The magnitude system 1.1 Apparent magnitude Astronomers are stuck with the antiquated old system of magnitudes and so a clear explanation of what this system is and how it relates to more sensible units is important. ... 1.2 Absolute magnitude Absolute magnitude is a logarithmic luminosity scale. ... One usually goes by the round about process of referring to the absolute magnitude of the sun. ... Magnitudes and surface brightness 6/6 ...

... Man, Zirm & Toft 2014 . Resolving the Discrepancy of Galaxy Merger Fraction Measurements at z ~ 0 - 3 . Man, Toft, Zirm, Wuyts & van der Wel 2012 . The Pair Fraction of Massive Galaxies at 0 <= z <= 3 . ... Is merging important for the size and mass growth of galaxies? Image credit: Hubble . ... Are quiescent galaxies actually . ... Man, Greve, Toft et al. 2014 . ... Image credit: NASA, ESA, S. Toft (U. Copenhagen), and A. Felid (STScI) . ...

... Since founding of the Olympiad] The Olympiad participants are not supposed to study at any institutions of higher education (university or school which can be considered technical colleges). ... Note: Exception may be done for the second time participating in IAOs students not older than 14.00 years on January 1st of the year of the Olympiad (i.e. born after January 01, 1999). ... Team of region, city, town: . ... of the XVIII International Astronomy Olympiad (2013), . ...

The 2016 Project ASTRO introductory workshop will take place September 16-17, 2016. ... Participating teachers and astronomers are required to attend. ... Home Phone: . ... work email . ... Please briefly describe your background and your experiences in astronomy (if different). Describe experiences you have working with schools or explaining astronomy to students and/or the public. ... What grade level(s) do you prefer to work with (check all that apply) . ... either work or home . ...

... Archives . ... ArXiv] A Lecture Note, June 17, 2007 . ArXiv] Solar Cycle, June 18, 2007 . Jun 18th, 2007| 05:08 pm | ... One of arxiv/astro-ph preprints, arxiv/0706.1703v1 discusses correlation between galactic HI and the cosmic microwave background (CMB) and reports no statistically significant correlation. ... Are these correlation studies truly statistical science? ... Therefore, I have been doubting what is so important about correlation in astronomy. ... Chandra Blog . ...

The sky background can contribute significant Poisson noise in broad and medium band filters, and must be taken into account during noise calculations. The actual sky brightness depends on the heliocentric ecliptic coordinates (latitude and longitude) in a manner summarized in Table 6.3 . ... 22.4 . ... An average sky brightness of V=22.9 mag arcsec -2 is assumed. ... Values for other filters or sky brightnesses can be computed from Table 6.2 , Table 6.1 , Table 6.3 , and Equation 6.2. ...

... Observing . ... Solar Observing . ... April 3 (SUN) - Solar Observing, Central Park , Manhattan . ... APRIL'S SKY . ... Lecture Series at the American Museum of Natural History The Amateur Astronomers Association is proud to present an astronomy lecture series from October through May each year for our members and the .. ... The€аAmateur Astronomers Association of New York€аwas organized in 1927 to promote the study of Astronomy, emphasizing its cultural and inspirational value. ...

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... The UK has a very vibrant solar system science community highly regarded internationally. ... The knowledge gained from such research has significant application to other STFC science areas, and indeed the science of other research councils. ... We therefore seek support to provide the 2012 Introductory Solar System Plasmas School, which will provide valuable training for the next generation of solar system scientists. ...

Proposal Identification No.: A2583 Date Received: 2010-Jun-01 16:00:08 Technical Page Proposal Type: General Category: Sub-Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Spectroscopy Galactic 14 Hours 1 hr Are Infrared Bubbles Actually Rings? ... We propose observing 16 "IR bubbles" at C-band, simultaneously recording 8 Hn lines to search for the broad/double lines from the HII regions predicted by the ring hypothesis. ...

. JSC Turns 40 Home | Article | Gallery . Johnson Space Center at 40 Years Imagery . low res (34 K) . S90-48903 --- An actual Apollo Saturn V launch vehicle which was originally built to take a crew of astronauts to the Moon has been on permanent exhibit since 1978 in the Johnson Space Center's Space Park. In the background are models of Mercury-Redstone and Little Joe rockets. Curator: JSC Web Team | Responsible NASA Official: Amiko Kauderer | Updated 7/16/2010 . Privacy Policy and Important Notices

... Most Important Journals . Less Popular Astronomical Journals . Physics . Space, Selectial mechanics, .. Russian Journals . ... Astrophysics & Astronomy . ... Astronomical Journal . ... New Astronomy . ... Publications of the Astronomical Society of the Pacific . ... STScI News . Space Telescope Insitute Newsletter . ... Journal of Astronomical Data . ... Journal of High-Energy Physics (mirror in CERN ) [astro, grav, hi-energy .. ... Journal of Experimental and Theoretical Physics . ...

... One important issue for the spectral analysis with X-ray detectors is the treatment of background for extended sources. ... To deal with the particle background (more or less constant outside proton flares), one should assign weights to the reference event list and extract images or spectra using the same spectral or spatial (in detector coordinates) selection as the source. The original spatial selection (on the source) is usually applied to sky coordinates (not detector coordinates). ...

... He made observations of a supernova (literally: nova= "new star") in 1572 (we now know that a supernova is an exploding star, not a new star). ... Brahe's meticulous observations showed that the supernova did not change positions with respect to the other stars (no parallax). ... This was early evidence against the immutable nature of the heavens, although Brahe did not interpret the absence of parallax for stars correctly, as we discuss below. Brahe made careful observations of a comet in 1577. ...