... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2015 June 2 . Polaris and Comet Lovejoy . ... Explanation: One of these two bright sky objects is moving. On the right is the famous star Polaris. Although only the 45th brightest star in the sky, Polaris is famous for appearing stationary. ... About APOD | ... NASA Official: Phillip Newman Specific rights apply . ...

... A Fisheye View of Comet Hale-Bopp . ... 25.08.1997 . ... Credit: J. C. Casado Explanation: Thousands of stars, several constellations, a planet and a comet all graced the western horizon over Ujue, Spain just after sunset on April 4th, 1997. ... Comet Hale-Bopp , with both tails blazing, appears right of center. ... Publications with keywords: Comet Hale-Bopp . Publications with words: Comet Hale-Bopp . ... Comet Hale-Bopp Over Val Parola Pass . ... The Dust and Ion Tales of Comet Hale-Bopp . ...

... Armagh Observatory, College Hill, Armagh BT61 9DG, +44 (0)28 3752 2928 . ... Risks Comparable to NEOs . ... The Increasing Rate of Discovery of Asteroids . ... Comet and Asteroid Collision Probabilities . ... Extreme albedo comets and the impact hazard (PDF Format) . ... Asteroid Impact Animations . ... Workshop on Scientific Requirements for Mitigation of Hazardous Comets and Asteroids - 2002 . ... The Spaceguard Survey Report, 1992 (PDF) . Tsunami from Asteroid/Comet Impacts . ...

Astronotes Armagh Planetarium's Stellar Blog! ... Space Flight . ... Posted on July 22, 2013 | 55 Comments By now interest in Comet C/2012 S1 (Comet ISON) is building. ... Continue Reading.. ... Posted on June 18, 2013 | ... Posted on May 2, 2013 | ... Posted on April 2, 2013 | ... Posted on March 6, 2013 | 4 Comments Comet C/2011 L4 PANSTARRS has been wowing observers in the southern hemisphere recently and there have been some fantastic images taken of it. ... Posted on February 20, 2013 | ...

... The awsome spectacle of a brilliant comet, with its long ghostly tail streaming behind it, is a rare event. ... Only one other comet, Comet Halley, was seen so far from the Sun, giving scientists an opportunity to watch it as it slowly warmed up and sprouted a tail. ... Comets are the Rip Van Winkles of the solar system -- mini-worlds that have changed little during their 4.5-billion-year nap far from the Sun. ... Observing Comets . ... Once, comets inhabited the entire solar system. ...

... 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. ...

... May 1, 1996 . Comet Hyakutake and a Cactus . ... Today Comet Hyakutake reaches its closest approach to the Sun . Comet Hyakutake is now at its intrinsic brightest, but because of its distance from the Earth , it will appear less bright to us than it did during its closest approach to the Earth in late March. ... Latest Comet Hyakutake images: APOD Hyakutake Archive , JPL , Fayetteville Observer-Times , NASA's Night of the Comet , ICSTARS , Jerry Lodriguss , ScienceWeb , Crni Vrh Obs. ...

... click image to view discuss) . ... This is a quick shot of the near-Earth asteroid 2005 YU55 using four consecutive exposures from the Harvard MicroObservatory robotic telescope in Amado, Arizona, on the night of Nov. ... 10, 2015 . This is Comet Lovejoy C/2014 Q2 as it appeared at about 10:30 pm Saturday, Jan. 10, 2015, from my back yard in Belmont, MA, about 5 miles west of downtown Boston. ... Main image: 0.6 second exposure. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... Home Articles Comet Hyakutake: The Great ?Earthgrazing? Comet of 1996 . ... Beyond New York City . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . Observing Resources for Amateur Astronomers - Part 2: Intermediate Observers . ... Comet Hyakutake: The Great "Earthgrazing" Comet of 1996 . A History of the First Forty Years of the Amateur Astronomers Association . ... 2016 Amateur Astronomers Association of New York Designed by Press Customizr Powered by . ...

We present a time-lapse sequence of 20 near-infrared ( J and K band) snapshots of the central 20 20 of the Crab pulsar wind nebula, taken at subarcsecond resolution with the Hokupa`a/QUIRC adaptive optics camera on the Gemini North Telescope and sampled at intervals of 10 minutes and 24 hr. It is observed that the equatorial wisps and polar knots in the termination shock of the pulsar wind appear to fluctuate in brightness on kilosecond timescales. ...

... All images on this page are copyright Robert H. McNaught. ... There have been so many requests for high resolution copies of these images that I ask that all enquiries for these to go directly to Science Photo Library. C/2006 P1 on Jan 18, 10:22 UT. Photo: R. H. McNaught, Siding Spring Observatory. Canon 5D, 135mm, f/2.0, 2 sec exp., ISO 1600 . ... ISO 200 . ... Canon 5D, 50mm, f/2.0, 30 sec exp., ... Canon 5D, 135mm, f/2.0, 120 sec exp., ... Canon 5D, 50mm, f/2.0, 110 sec exp., ...

... An artificial comet holds secrets to Earths life . ... Supernova showered Earth with radioactive debris . ... Get to Know the Night Sky . ... When will Comet Halley next pass near Earth? Are there any other comets that will come close enough to our planet that people in the United States can see it at night? ... Comet Halley will return to the inner solar system in 2061. ... Get instant access to subscriber content on Astronomy.com! ...

... Telescopes . ... The International Conference "Dark Ages and White Nights (Spectroscopy of the CMB)" (June 20-24, 2016) . ... The International Conference "Stars: from collapse to collapse" (October 3-7, 2016) . The traditional annual competition conference of scientific and scientific-engineering papers of the Observatory staff members . ... A session of the Dissertation Council (October 16, 2015) . ... International scientific conference "Large Optical Telescopes" (October, 10-13, 2011) . ...

The link between the tilt of the Earth's axis to the ecliptic and seasons of the year--length of day, effectiveness of sunlight, polar day and night, and seasons south and north of the equator, as well as near it. ... This lesson plan supplements: "Seasons of the Year," section #3: on disk Sseason.htm , on the web . ... Actually, Earth is most distant from the Sun in summer! ... Because of the inclination angle i, sometimes the North Pole of the Earth leans towards the Sun, sometimes it leans away. ...

... Circumstellar disc of beta Pictoris: constraints on grain properties from polarization. To appear in the Astronomy & Astrophysics . abs , src , ps ] . ... Dust influx to Titan from Hyperion . ... abs ] . ... Characteristics of bulges and disks in interacting galaxies . ... Dust grains around Herbig Ae/Be stars: porous, cometary-like grains? ... To appear in the Astronomy & Astrophysics Supplement . ... Finally, Links may lead you to more options (e.g. via the LANL preprint system). ...

During the course of ten nights of observing (UT 27 April - 6 May 1996), the KPNO Mayall 4m Telescope was used to image the Hubble Deep Field in the near infrared. The IRIM camera employs a 256 x 256 Rockwell NICMOS-3 HgCdTe array, with a scale of approximately 0".6/pixel at the 4m f/15 Cassegrain focus. ... A paper on the HDF/IRIM data (observations, reductions, catalogs and basic analysis) is in preparation, titled "Near Infrared Properties of the Hubble Deep Field" by Dickinson et al. ...

... The NAIC requests that any publication based on results from Arecibo Observatory contain the following acknowledgement: . ... NAIC budget permitting, for U.S.-based scientists able to show conditions of demonstrable hardship , NAIC can contribute towards publication costs for papers reporting original observations made with the Arecibo telescope. ... List of publications (PDF) . ... July 1, 2008 - June 30, 2009 . ... July 1, 1994 - June 30, 1995 . July 1, 1993 - June 30, 1994 . ...

... Back to the Attic ; . The ESO staff at La Silla went to extraordinary lengths to observe Comet Bradfield when it appeared near the eastern horizon on March 8, 1978. The above drawing, by Karen Humby (Mrs. Saxby since May 13, 1978), is based on reports of reliable eyewitnesses, but does not necessarily express the official opinion of the Organization. б? The ESO Messenger (Editor: Richard West) . Copyright (c) 2013 eso.org/~hboffin . ... Design by Niall Boffin FreeCSSTemplates.org . ...

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 . ...

... Near Arlington subway station . ... Entering Boston Garden from Arlington street . ... View on John Hancock Tower from Boston Commons . ... On the street . ... Small fountain near Boston Commons . ... Street shops . ... Boston City Hall . ... Side of Trinity Church. ... Near Church of the Christ Scientist . ... Pool near Church of the Christ Scientist . ... Boston Park Plaza Hotel, side view . ... On the street, near Computer and Childen Museums . ... On the streets. Near Old North Church . ...