... Bad Astronomy . Misconceptions . ... Bad Astronomy : "We're light years more advanced than our competition!" ... Even the closest astronomical object, the Moon, is 400,000 kilometers away! ... A beam of light will travel 9,500,000,000,000 kilometers in one year. This distance is defined as a light year ; the distance light travels in a year. ... This is another example of Bad Astronomy; like a light year, a parsec is a unit of distance, not time (to be specific, it equals 3.26 light years) . ...

Villains and Heroes of Lights and Lighting Fixtures . If we are to reduce the effects of light pollution, we must learn about the types, both good and bad, of fixtures used in outdoor lighting. ... In fact, this type of fixture is often chosen for this very reason. ... Although these lamps are not very energy efficient, and they are often found in older, inefficient fixtures that enhance light pollution, they still exist in great abundance in most locations and are still sold by the millions. ...

... ESO is building what will be the World's largest optical telescope array, The Very Large Telescope (VLT). The VLT Project organisation is responsible for the design and construction of the Unit Telescopes, including enclosures, optics, adapter-rotators and coating unit. ... Unit Telescopes Overview - This page is outdated, an update is in process. ... Secondary mirror (M2 Unit) - This page is outdated, an update is in process. ... Coating Unit - This page is outdated, an update is in process. ...

Wave-Particle Duality of Light. click here to see a wave experiment . ... In the wave theory, greater light intensity simply means more photons. Each photon ejects electrons in the same way, so more intensity means more electrons. Threshold frequency and electron K.E. should not be affected by intensity. ... Light frequencies below the threshold eject no electrons, no matter how intense the light. Light frequencies above the threshold eject electrons, no matter how low the intensity. ...

... According to the big bang theory, huge amounts of energy were released, giving rise to matter, antimatter and dark matter. ... The Big Bang Theory has enabled scientists to make certain predictions. ... These particles are the building blocks of matter, antimatter and dark matter. ... This could theoretically happen if the hydrogen was shockheated to over 100000 C. The Big Bang Theory is only a theory and so there is no concrete evidence to suggest that it is entirely correct. ...

Astronomy Picture of the Day . ... 24.11.1997 . ... Jets of protons and electrons that shoot away from objects such as quasars and black holes appear to travel at speeds approaching this maximum speed, though. ... In the above frame from a computer simulation , a jet traveling only 98 percent of light speed rams and mixes with interstellar material. ... Publications with keywords: black hole - jet - NEAR project . Publications with words: black hole - jet - NEAR project . ... A Jet from the Sun . ...

... A wonderful site where the debate about the nature of light sits. ... Shadow and Light science activities - A short list of activities for students about light and shadow designed by an undergraduate Education major in New Foundland. ... Projecting Shadows - Fantastic interactive site about how to make shadows from the Light/Block/Shadow technique. ... The Energy Story: Solar Energy - Aimed towards children, this is a short introduction about solar energy. ... You Light Up My Life | ...

The leaning tower of Pisa . ... The velocity of a ball dropped from a high place increases each second by a constant amount, usually denoted by the small letter g (for gravity). ... For the falling ball in the preceding example, after t seconds that would be . ... If in addition the ball is also given at the start a horizontal velocity w , its horizontal motion continues unimpeded, advancing a distance w each second, even while the ball is falling (air resistance is now ignored). ...

... June 13, 1999 . Zodiacal Light . ... If the glow appears as a faint band of light running across the whole sky , you are probably seeing the combined light from the billions of stars that compose our Milky Way Galaxy . But if the glow appears triangular and near the horizon , you might be seeing something called zodiacal light . Pictured above , zodiacal light is just sunlight reflected by tiny dust particles orbiting in our Solar System . ... About APOD > . ...

Tired light models invoke a gradual energy loss by photons as they travel through the cosmos to produce the redshift-distance law. ... The tired light model can not produce a blackbody spectrum for the Cosmic Microwave Background without some incredible coincidences. ... So the CMB must have come from a far away part of the Universe, and its photons will thus lose energy by the tired light effect. ... Assume that the CMB starts out as a T = (1+z)*T_o = 2.998 K blackbody, which is the blue curve. ...

... The general term for these waves is "Electromagnetic Waves". ... ASTR1001 Wavelengths · Electromagnetic waves, while all travelling at the same speed, can have different wavelengths (the distance between the crest of one wave and the next). ... Red Light: Wavelength 700nm Green Light: Wavelength 550nm Blue Light: Wavelength 400nm Ultra-Violet Light: Wavelength 300nm ASTR1001 The Electromagnetic Spectrum · Electromagnetic waves can have any wavelengths at all: anywhere from picometres to light-years....

Blackholes2 Forum Message . Forums: . ... Only Photons Travel At The Speed Of Light . Forum List | ... Posted by Richard Ruquist on October 21, 2004 12:29:14 UTC . ... Charge has mass and from the theory of relativity, they cannot travel at the speed of light. Radio waves are photons, a form of light. ... 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" . ...

... BOM2 and the basic block of solar limbograph including pointing and control systems ? ... Fine tracking platform (FTP) for Sun tracking by the sight axis of the limbograph; . ... Tracking system frequency ? ... Controller of the control system and solar fine tracking of the sight axis of the limbograph; . ... The basic relative construction of the elements and instrumental blocks of the "Astrometria" space experiment is shown on the block diagram of units within the complex of SL-200 solar...

... A star party is a gathering of amateur astronomers who set up their telescopes and observe the dynamic night sky. ... Star parties are best scheduled during first quarter and waxing gibbous Moon. During full moon, the moon is so bright it obscures a view of other celestial objects and even the Moon is best viewed when NOT full. ... We will consult local weather forecasters and make a decision by 2:00p on the day of the star party. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...

... JWST . The End of the Dark Ages: First Light and Reionization . ... Science Blog . ... Science . JWST Science . ... The Assembly of Galaxies . ... In addition to the supernovae of the first light stars, JWST will also be able to detect the first galaxies and star clusters. The JWST First Light theme science goal is to find and understand these predicted first light objects. ... An observational approach to identify these objects has been described in the JWST SWG First Light white paper . ...

... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Such a model can reproduce much of the observed late-time evolution of the radio flux density and spectral index (though recent results for SNб 1993J (van Dyk et al. 1994) show that the Chevalier model does not adequately describe the early behaviour of radio light curves for this supernova, perhaps due to variations in the mass-loss rate and clumping in the stellar wind, which are not yet accounted for in the model). ...

Hubble Observations Shed New Light on Jupiter Collision . Was it a comet or an asteroid? ... Their initial findings, combined with results from other space-borne and ground-based telescopes, shed new light on Jupiter's atmospheric winds, its immense magnetic field, the mysterious dark debris from the impacts, and the composition of the doomed comet itself. ... Hubble's ultraviolet observations show the motion of very fine impact debris particles now suspended high in Jupiter's atmosphere. ...

The Future of Single Dish Radio Astronomy Robert L. Brown N AI C Robert L. Brown 2005 NAIC/NR AO Astronomy Single Dish Summer School 1 "FUTURE" Year 2001 Vision* 1. ... Astronomy and Astrophysics in the New Millennium, Astronomy and Astrophysics Survey Committee, Board on Robert L. Brown 2005 NAIC/NR AO Astronomy Single Dish Summer School 2 1 "Future" Year 2003 Vision* 1. ... Robert L. Brown "Future" Year 2003 Vision* 7. ... Robert L. Brown A Science-Driven Future of Single Dish Radio Astronomy 4. ...

In 1572, the Danish astronomer Tycho Brahe observed and studied the explosion of a star that became known as Tycho's supernova. ... Astronomers have detected a light echo from this supernova, meaning they can see the light from the explosion itself 400 years later. ...

... Our Galaxy . ... Space Flight . ... November . October . ... Posted on November 25, 2011 | 6 Comments A few years ago there was a vogue among historians to write about тАШcounterfactualsтАЩ.A counterfactual examines the importance of an event for subsequent history by asking what if that event [ ] . Continue Reading.. ... 1 Comment Studying galaxies and clusters in many wavelengths of light tells astronomers more than a single image ever could. ... Posted on October 20, 2011 | ...