... A Double Eclipse of the Sun . ... Last Friday was noteworthy because part of the Earth was treated to a rare total eclipse of the Sun. ... But that turned out to be good weather for watching the Moon's umbral shadow race across northern planet Earth. ... Earth During a Total Eclipse of the Sun . ... It appears dark in the region where people see the eclipse, because that's where the shadow of the Moon falls. ... Do you see it? ... Would you go to the end of the world to see a total eclipse of the...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. 2011 February 1 . Powers of Ten . Credit Copyright: Charles Ray Eames ( Eames Office ) . ... The most famous short science film of its generation gives breathtaking comparisons. That film, Powers of Ten , originally created in the 1960s, has now been officially posted to YouTube and embedded above . ... About APOD | ...

... Bad Astronomy . ... Bitesize Astronomy . ... Bad Astro Store . ... Slacker Astronomy . ... Keep Bad Astronomy close to your heart, and help make me filthy rich. ... Life Under the Moon . ... Seeing Jupiter's Moons . ... Time Zones and the Spherical Earth . A Companion to the Earth? ... December 19, 1999) . ... Big Moon, Little Moon . ... How Big is the Moon? ... 14, 2000) . ... 2008 Phil Plait. ... Subscribe to the Bad Astronomy Newsletter! Talk about Bad Astronomy on the BA Bulletin Board! ...

Astronotes Armagh Planetarium's Stellar Blog! ... Sun . ... January . ... March . ... Posted on March 16, 2015 | No Comments As everyone knows on Friday 20 March 2015, a total solar eclipse will occur across the far northern regions of Europe and the Arctic. ... Continue Reading.. ... 3 Comments Already the year 2015 is proving to be a great year for stargazing with planets, comets and meteorites gracing the skies but prepare for March as it brings a тАШmicro [ ] . ... Posted on February 4, 2015 | ...

Advances in Wideband SETI and Implications for Radio Telescope Design Dr Ian S. Morrison 24 October 2011 Resurgence in SETI New generation radio telescopes and anticipation of the SKA Emergence of ` wideband SETI ' Successes in astrobiology, in particular exo-planet discoveries 2 1235 Kepler Worlds 68 288 662 184 54 are `habitable' Copyright © Jill Tarter, SETI Institute SETI by Eavesdropping Expect civilisations to have a short timespan for high power ...

Magnification (Power) And Using Eyepieces . ... To determine power in a telescope, divide the focal length of the telescope by the focal length of the eyepiece. By exchanging an eyepiece of one focal length for another, you can increase or decrease the power of the telescope. For example, a 25mm eyepiece used on a telescope with a 1000mm focal length would yield a power of 40x (1000 / 25 = 40) and a 10mm eyepiece used on the same telescope would yield a power of 100x (1000 / 10 = 100). ...

Dimitri ZVONKINE (Paris-7 Jussieu): Models of 2-dimensional gravity and enumeration of ramified coverings of the sphere . We explain why the enumeration of ramified coverings of the sphere provides a model of 2-dimensional gravity. ... We also prove some combinatorial results concerning ramified coverings of the sphere. ... It appears naturally in elementary graph enumeration problems, in the intersection theory on moduli spaces of stable curves, and in the enumeration of ramified coverings. ...

Next: Results Up: High Resolution Measurements from Previous: Introduction . The first step in PSA is to Fourier transform the image and calculate the square modulus of the FT to generate the power spectrum, . ... Specifically, one excludes the very lowest frequencies where the large scale nonuniformities in the image have the greatest effect, and one limits the fit to a frequency range where the SNR is sufficiently high. ...

... Taken from the NASA/JPL information summary "Our Solar System at a Glance". The National Aeronautics and Space Administration's (NASA's) automated spacecraft for solar system exploration come in many shapes and sizes. ... Electrical power is required to operate the spacecraft instruments and systems. ... Between 1959 and 1971, NASA spacecraft were dispatched to study the Moon and the solar environment; they also scanned the inner planets other than Earth -- Mercury , Venus and Mars . ...

... Science Users Information > Science and Technical Meetings > Conferences 2005 > vltiws05 . ... Instrumentation Development . ... The second part (2 days) will be organized as a joint workshop between the European Interferometry Initiative (EII) and ESO on "2nd Generation VLTI Instrumentation". The purpose of the Workshop is to present and discuss the additional instrumentation required in the next 5-8 years to optimize the scientific return of the Very Large Telescope Interferometer (VLTI). ...

Lectures . ... Home Lectures Lecture Series 2011-2012 Lecture Series 2011-2012 ? тАЬSearching for Earthlike WorldsтАЭ ? Debra Fischer . ... Lecture Series 2014-2015 . Lecture Series 2013-2014 . ... Lecture Series 2011-2012 . ... Observing Resources for Amateur Astronomers - Part 1: Beginning Observers . ... 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 . ...

... The Magazine . ... Observing . ... Magazine . ... Star Atlas . ... An artificial comet holds secrets to Earths life . ... stars . ... Observing Podcasts . ... Astronomy for Kids . ... Observing springtime deep-sky objects with a large telescope . Springtime observing for small telescopes . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ... Click here to receive a FREE e-Guide exclusively from Astronomy magazine. ... Astronomy Magazine . ...

... It was discovered during 1970's that radiation from electrical power transmission lines is one source of whistler-mode waves in the magnetosphere . Most of the world's power systems use 50 Hz or 60 Hz, but their harmonics in the kHz range (due to mechanical imperfections, nonlinear loads, etc.) can be radiated by transmission lines and leak into the magnetosphere with sufficient intensity to stimulate wave growth and emission generation, much like the VLF transmitter signals. ...

... 21 February 2008 total lunar eclipse photographed by Bob English in Franklin, TN. ... Friday, 22 February 2008 11:16 . International Year of Astronomy, Ireland National Node . ...

... On the morning of Thursday, 26 February, amid the Gal pagos Islands, the Sun will fade from view. Not the culmination of ancient prophecy, but none less mystical, Earth's small Moon will be executing a slow slide past the enormous Sun. ... And anyone living in southern North America, Central America, northern South America, or on islands and cruise ships in the Caribbean Sea will, weather permitting, have the opportunity to experience the wonder of a solar eclipse. ...

... The Russian TESIS (FIAN) Solar Observatory has transmitted observations back to Earth of the solar eclipse made on July 22nd, 2009. ... On the first occasion, the satellite passed through the eclipse area at 04:30 Moscow time, making it the first on our planet to see the shadow of the Moon, which was still in space and was only approaching the Earth ( film 1.2 MB, wmv format ). ... The first Moon passage over the solar disk (00:30 UT) (Movie wmv; 1.2 MB) . ...

... The question which method of the detection of features in the test statistic is the most sensitive, is of considerable importance for all practical TSA applications. ... A power of the test statistic is the probability that is accepted for the given Y : . ... Then, all statistics based on models with 3 parameters have similar values of the test power: power spectrum, Scargle statistics, fit of a sinusoid, AOV(3) statistic and PDM(3) statistic with corrected probability distribution. ...

... February 22 2001 09:00 (Moscow time) . The station "Mir" and cargo vehicle «Progress л 1-5» operations scheduled for 21-22 February completed. The onboard "Mir" and the cargo ship systems checked out, orbit radiomonitoring performed. ... The Station remains pressurized, the onboard systems perform nominal. ... The Station and the cargo ship onboard systems further checkout and the orbit radiomonotoring are scheduled for 22-23 Feb. ...

... As you may know, I'm writing a book for Prentice-Hall, due in January, called Peer Instruction for Astronomy. ... I'm looking for a colleague or two willing to review/critique some of the ConcepTest questions that will be included in the book. See http://hea-www.harvard.edu/~pgreen/educ/ConcepTests.html I suspect that a significant contribution would only take you 2-3 hours. ... ConcepTests are multiple choice questions which the students pose to each other in small groups, during class. ...