Astronomy Picture of the Day . ... Pictured above are not aurora but nearby light pillars, a local phenomenon that can appear as a distant one. ... Big, beautiful spiral galaxy M101 is one of the last entries in Charles Messier's famous catalog, but definitely not one of the least. ... The Flaming Star Nebula from CFHT . ... Inside the Eagle Nebula . ... A closer look at the Eagle Nebula, however, shows the bright region is actually a window into the center of a larger dark shell of dust. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 February 10 . An Extremely Long Filament on the Sun . ... Visible as the dark streak just below the center in the featured image, the enormous filament extended across the face of the Sun a distance even longer than the Sun's radius -- over 700,000 kilometers. ... Follow APOD on: Facebook , Google Plus , or Twitter . ... About APOD | ...

... Armagh Planetarium . ... Universe . ... Posted on March 13, 2015 | No Comments In association with BBC Stargazing Live 2015 and the Northern Ireland Amateur Astronomical Society (NIAAS) Armagh Planetarium is opening its doors for a free open evening on Tuesday 24th of [ ] . Continue Reading.. ... 2 Comments At the planetarium it is often stated that every time you look into the sky you are doing astronomy, it has become a slight mantra that we chant to encourage [ ] . ... Newer Entries . ...

... Bad Astronomy . ... Bitesize Astronomy . ... Last week's Snack talked about how black holes can affect the environment around them in such a way as to be very bright . ... It's a common misconception that black holes always have matter swirling into them. ... As this matter gets closer and closer to the black hole it piles up and a large, fairly flat disk forms. This is called the accretion disk , because matter from this disk accretes (that is, falls in) on the black hole. ... 2008 Phil Plait. ...

M1 image More About M1 Nice Color Picture . ... M16 image More About M16 HST image . ... M31 image More About M31 Nice Color Picture . ... M42 image ; M43 image More About M42/43 Nice Color CCD Picture . M51 image More About M51 Color Image of M51 M51 Supernova . M57 image More About M57 Nice Color CCD Picture Very Deep M57 Image . ... M81 image More About M81 M81 Supernova Ultraviolet Image of M81 More about Ultraviolet Imaging . M82 image More About M82 M82 False Color M82 True Color . ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2000 February 28 . The Sombrero Galaxy from VLT . ... FORS1 , VLT ANTU , ESO . ... Reasons include the Sombrero 's unusually large and extended central bulge of stars, and dark prominent dust lanes that appear in a disk that we see nearly edge-on. Billions of old stars cause the diffuse glow of the extended central bulge. ... About APOD | ...

... One of this year's largest mass ejections from the Sun's atmosphere was recorded last Sunday by TESIS telescopes aboard the CORONAS-PHOTON satellite ( video - wmv 4.3 MB ). ... Over the course of a week, two gigantic solar prominences were simultaneously ejected from the surface of the Sun. ... Earth will not feel the Sun's influence either. ... The TESIS observatory ї TESIS: www.tesis.lebedev.ru . ... One of this year's largest mass ejections from the Sun's atmosphere (movie WMV, 4.3 MB) . ...

The record of baryon acoustic oscillations (white circles) in galaxy maps helps astronomers retrace the history of the expanding universe. These schematic images show the universe at three different times. ... These variations included the signal of the original baryon acoustic oscillations (white circle, right). As the universe has expanded (middle and left), evidence of the baryon oscillations has remained, visible in a "peak separation" between galaxies (the larger white circles). ...

Click here for a PDF version of Richard Berry's talk. Universe 2001: Results of Saturday Evening Imaging . ... Support data for calibrating the CCD consisted of eight bias frames and four 60-second dark frames. ... To rescue the images, we processed and registered the four 15-second integrations and the 60-second integration separately. ... The 60-second images were then registered to the composite of 15-second images to produce the image M11-COMBO.FTS. ...

... Asteroids are awkward to photograph. Can you imagine how hard it is to spot one of these tiny, dark lumps of rock against the blackness of our night sky? ... Like Earth, asteroids move around the Sun. ... But astronomers don t give up easily, and asteroids are something they really want to study. ... The asteroid in this photograph is called Itokawa. It became famous in 2005 when a Japanese spacecraft called Hayabusa visited it and took some photographs including this one! ...

... The HDF Project. ... How to obtain the data catalogs. Observing logs and ancillary information. Technical information on the data reduction pipeline. Technical information on image registration and combination. Technical information on source detection and photometry. HDF Clearinghouse -- followup observations and analysis. ... Hubble Deep Field Academy -- Educational Resource for Middle School students . Hubble Deep Field South The Space Telescope Science Institute home page . ...

... Comet Ikeya-Zhang, designated C/2002 C1 (Ikeya-Zhang), is named after Kaoru Ikeya of Shizuoka prefecture, Japan, and Daqing Zhang of Henan province, China, who independently discovered it on the night of 1 February 2002. A preliminary orbit reported the following day indicated that it would come moderately close to both the Earth and the Sun and that it might become visible to the naked eye during late March and April 2002. ... Bailey, M.E., Clube, S.V.M. and Napier, W.M. The Origin of Comets . ...

There has been ripple in the lband wide bandpass near 1400 Mhz during the a1861 run of may04 and during the a1914 run in aug04. ... The first two sbc were polA, polB at 25Mhz while the last two sbc were polA,polB at 12.5 Mhz. When they observed above 1370 Mhz, the 1320 hipass and 1370 hipass wave guide filters were installed. ... Project a1914 used the 1st two sbc for polA and polB at 25 Mhz. ... Fig 1. (on/off-1) degK vs frequency with offsets for plotting. ... The bumps at 1381 Mhz are gps L3. ...

Sound waves cannot travel through the vacuum of space. ... These electromagnetic waves can be recorded by devices called spectrographs on many of the world's most powerful telescopes. On this web page, I have converted these electromagnetic waves into sound waves. I've also reduced the frequency 1.75 trillion times: the original frequencies are much too high for humans or even dogs to hear. This allows us to listen to many parts of the universe for the first time. ...

Astronomy Discussion Forums . ... For The Record . ... Post Message | ... Posted by Aurino Souza on October 17, 2002 13:03:14 UTC . ... for the record...."vague denials and buck-passing?" - carefuluniverse - October 17, 2002 - 16:06 UTC . your post, translated - aurino1 - October 17, 2002 - 16:53 UTC . ... www.astronomy.net . About Astronomy Net | ... Forum posts are Copyright their authors as specified in the heading above the post. "dbHTML," "AstroGuide," "ASTRONOMY.NET" & "VA.NET" . ...

... You are here: start €Ё correlator €Ё records €Ё v252k . Trace: тАв v252k . correlator:records:v252k . v252k . ... Observers wiki . ... Added extra station to .skd file (called 'Td') and added this to vex2model_updated.pl as DSS45. ... Data from part 2 doesn't appear in plots etc?? ... Final output file: V252K.UVF . ... Comments: . Plots of uncalibrated amplitude and phase against frequency . ... correlator/records/v252k.txt €§ Last modified: 2014/11/11 18:08 (external edit) . ...

... Over the first 4 years, its X-ray telescopes eROSITA and ART-XC will survey the whole sky with a record sensitivity in the 0.5-10 keV energy band. ... The goal of the second international Spectrum-RG conference is to discuss the different scientific topics addressed by the mission, synergies with surveys at other wavelengths, and requirements to follow-up observations.Contributed talks and poster presentations are invited on the topics related to the SRG science goals. ... Active galactic nuclei . ...

Lectures . ... Home Lectures Lecture Series 2010-2011 Lecture Series 2010-2011 ? The History of the Universe in One Hour? by Max Tegmark . ... Lecture Series 2010-2011 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... A History of the First Forty Years of the Amateur Astronomers Association . ... Amateur Astronomers Medal . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

In order to measure the density of the Universe, it is necessary to sample a region that is larger than the scale on which the Universe becomes approximately homogeneous. ... When applied to clusters of galaxies we find a mass to luminosity ratio that implies a density of the Universe that is about 0.3 times the critical density. ... Thus the mass-to-muinosity ratio appears to vary with the size of the region measured, from 3 in the solar neighborhood to 30 in galaxies to 300 in clusters of galaxies. ...

Magnetic field measurements onboard the Interball Tail spacecraft are carried out by the FM-3I instrument which consists of two flux-gate magnetometers covering two different ranges: [-200, +200] nT and [-1000, +1000] nT. Besides scientific goals, the FM-3I experiment data is used to perform the attitude control of the Interball Tail spacecraft. ... August 22, 1995 . ... October 18, 1995 . Top of the page . ... Back to the Interball Home Page . ...