81. Astronomy General Astronomy Homework Help Why is the expansion of the universe not measurable inside a classroom? Why is the expansion of the universe not measurable inside a classroom? http://www.brainmass.com/homework-help/astronomy/general-astronomy/

About Join BrainMass Sign-in Home ... Blog Astronomy Homework Solutions All Subjects Astronomy General Astronomy Why is the expansion of the universe not measurable inside a classroom? Why is the expansion of the universe not measurable inside a classroom? Posting ID: 3399 Add to Cart $2.19 Instant Download The sun's orbital period The Sun moves in a roughly circular orbit around the center of our galaxy (Milky Way), at a distance of 26, 500 light-years. The orbital speed is ~ 230 km/s. Calculate the Sun's total orbital period and estimate the mass of the galaxy? Posting ID: 5274 Add to Cart $2.19 Instant Download The sun's total power output According to Stefan's law, how much energy is radiated into space per unit time by each square meter of the Sun's surface? If the Sun's radius is 700,000 km, what is the total power output of the Sun? Posting ID: 5275 Add to Cart $2.19 Instant Download Comparing the energy of a gamma ray to a radio photon is achieved. What is the energy (in Joules) of a 450-nm blue photon? How many times more energy does a 0.0001-nm gamma ray have than a 10-MHz radio photon? Posting ID: 5443 Add to Cart $2.19 Instant Download

82. Astronomy News - Astronomy Magazine Source for news in astronomy, reports on astronomical discoveries, and NASA space missions. http://www.astronomy.com/asy/default.aspx?c=ss&id=26

83. Astronomy General Sites Mount Cuba Homepage. Comments or questions? Send Email to John.R.Richards@usa.dupont.com Copyright 2000 Mount Cuba Astronomical Observatory Last revised August 9, 2000 http://www.physics.udel.edu/MCAO/General.htm

Astronomy General Sites Astronomy Picture of the Day Astroweb, via Space Telescope Science Institute Cassini: Voyage To Saturn Clementine ... Mount Cuba Homepage Comments or questions? Send E-mail to John.R.Richards@usa.dupont.com Mount Cuba Astronomical Observatory Last revised: August 9, 2000

84. Science Centric | News | Astronomy Breaking news in astronomy and space. http://www.sciencecentric.com/news/topic.php?q=Astronomy

85. Astronomy Colleges And Astronomy Schools | USCS Tip 6 Travel to the Astronomy General schools on your lists from Tip 5. Usually you ought to visit every Astronomy General university on your short list, but if you can't visit it http://www.uscollegesearch.org/astronomy-general-colleges.html

86. ScienceDaily: Astronomy News Latest research news in astronomy including full text items and images, updated daily. http://www.sciencedaily.com/news/space_time/astronomy/

Astronomy News Sunday, November 14, 2010 Print Email Bookmark Latest News Astronomy Astronomy Black Holes Cosmic Rays Dark Matter ... Stars Cosmology Astrophysics Big Bang Cosmology Solar System Asteroids, Comets and Meteors Jupiter Kuiper Belt Mars ... Xena Space Exploration ESA NASA Satellites Space Exploration ... Books RSS Discovery Could Reveal Secrets of Ancient Martian and Terrestrial Atmospheres full story Detailed Dark Matter Map Yields Clues to Galaxy Cluster Growth full story ... Atoms-for-Peace: A Galactic Collision in Action Browse News Stories 1 to 10 of 5,711 stories (747 over past year) view headlines only Saturn Solar System Space Exploration ... Saturn Is on a Cosmic Dimmer Switch, Cassini Reveals November 11, 2010 full story Stars Extrasolar Planets Galaxies ... Astronomers Find 'Snooker' Star System November 10, 2010 full story Mars NASA Space Missions ... Sensor on Mars Rover to Measure Radiation Environment November 9, 2010 full story Black Holes Cosmic Rays NASA ... NASA's Fermi Telescope Finds Giant Structure in Our Galaxy November 9, 2010 full story Galaxies Astrophysics Stars ... Bars Kill Spiral Galaxies, Astronomers and Volunteers Discover November 9, 2010 full story Galaxies Optics Astrophysics ... Close-Up of Hidden Galaxies With New Cosmic Zoom Lenses November 8, 2010

87. Belajar Astronomy Blog on various astronomical topics intended for students who want to participate in astronomy competitions and olympiads. http://hansgunawan-astronomy.blogspot.com/

belajar Astronomy Monday, November 8, 2010 Solar System A couple videos related to the solar system: Source: youtube Posted by at 9:52 PM 0 comments Labels: video Tuesday, November 2, 2010 Latihan Soal: Gerak Benda Langit 1. Tentukan perbandingan gaya pasang surut antara Bumi-Bulan dan Bumi-Matahari bila diketahui jarak pusat ke pusat antara Bumi-Matahari 400 kali jarak pusat ke pusat Bumi-Bulan, diameter Bumi 4 kali diameter Bulan, dan massa Bumi 80 kali massa Bulan! 2. Sebuah satelit mempunyai orbit polar dengan ketinggian 5,49 x 106 m di atas permukaan Bumi. Setelah melewati di atas London, tentukan posisi satelit saat menyelesaikan satu kali orbit! 3. Mengapa objek langit yang besar (misalkan Matahari, Bintang, Planet, dll) bentuknya mendekati bola sedangkan objek langit yang relatif kecil (misalkan Asteroid, Komet, dll) bentuknya irregular? 4. Certain neutron stars are believed to be rotating at about 1 revolution/second. If such a star has a radius of 20 km, what must be its minimum mass so that material on its surface remains in place during the rapid rotation? 5. Planet imajiner mempunyai jarak rata-rata 120 satuan astronomi dari matahari. Berapa lama waktu yang diperlukan planet ini untuk mengorbit matahari? Berapa periode sinodisnya?

88. Small Telescope Astronomy For The Beginner Amateur Astronomer Tutorials on telescope designs, some basic astronomy theory, and amateur astronomy projects for the beginner or owner of modest equipment. http://www.astronomyhints.com/

Tumbleweed Observatory's Astronomy Hints Astronomy for the Beginner or User of Small Telescopes Home Telescope Tutorials Telescope Basics Binoculars Refractor Newtonian ... Simulated Views Howto Projects Webcam Astro-camera Cheap Tripod Piggyback Camera Mount Digital Camera Mount ... Classic 60m Refractor Astro Photos 2" Lens Astrophotos 60mm Telescope Astrophotos ETX90 Astrophotos 6" Newtonian Astrophotos ... Choosing a Camera Astro Product Reviews Bushnell 16x50 Binoculars Barska 15x70 Binoculars Meade ETX 90 RA Stargazer Steve DOB ... Celestron NexImage Astro Observing Tonight's Sky Observing Lunar Eclipses Observing Comets Observing Stars ... Mars 2007 Opposition Astronomy 101 Cosmology 101 Galaxy Formation 101 Black Holes 101 Science Theme Products Science T-shirts Global Warming T-shirts Linux T-shirts Favorite Sites Humorous Science T-Shirts Free Craft Howto's Building a Dobsonian Telescope Astro Links Do you feel that your telescope is just too small? Here's a friendly place for you to hang out if you get the feeling that your small telescope just isn't big enough to do anything with. To show what you can do with a modest instrument, there are pages of observations and photographs of the moon and planets taken through instruments as small as 2 inch (50mm) aperture, and no bigger than 6 inch (150mm). Though I've been an amateur astronomer for some 45 years (and a professional astronomer for some of that time), I primarily use small and modest sized telescopes. I've been through aperture fever, having owned up to a 10 inch behemoth Newtonian on an Equatorial mount, but my biggest telescopes are 6 inch Newtonians.

89. Index Of / Series 14 and 20 for binocular astronomy, kaleidoscope, mount, photography, periscope or AV project. http://www.fsmirrors.com

Index of / Name Last modified Size Description ... cgi-bin 26-Feb-2010 09:40 - Proudly Served by LiteSpeed Web Server at www.fsmirrors.com Port 80

90. Jewels Of The Sky - Astronomy In Your Hands Locating and observing a selection of targets through planning and preparation, required items, and background knowledge. http://www.astronomyinyourhands.com/activities/jewelsofthesky.html

Context jewels of the night sky. A small selection of nine jewels are described here. Specific Learning Outcomes You will locate and observe a selection of binocular targets. Planning and Preparation Locating and observing some of the jewels of the night sky is an excellent component of an organised stargazing trip. It is also an excellent individual activity. First use your Star Wheel to find out which of the jewels are visible to you at this time of year. Do this by looking on the Star Wheel for the constellations in which the jewels are to be found. Set the Star Wheel for tonight to see if they will be visible tonight. Next print the charts for the appropriate jewels download here All of the jewels are visible to the naked eye under dark conditions, but even so binoculars will make them look so much more impressive. If there is some light pollution at your observing site, then binoculars are essential. What You Need Star Wheels (see Star charts ( download here Binoculars Plus all of the things needed for a stargazing session (see Science Background Knowledge The four types of jewel Open cluster Globular cluster A roughly spherical ball of old stars (about 10 billion years old). Globular clusters typically contain hundreds of thousands of stars, and so appear as fuzzy blobs.

91. Binoculars For Astronomy And Observing Other Things In The Night Sky Equipment information and links. http://web.austin.utexas.edu/edcannon/binoculars.html

92. Handbook Of Binocular Astronomy A guide to deep-sky objects visible with binoculars including every constellation. http://www.starman.co.uk/book/hba-home.htm

93. SkyandTelescope.com - Equipment (How To) - Binoculars For Astronomy Equipment article by Ed Ting. http://www.skyandtelescope.com/howto/howtoequipment/3389576.html

94. Welcome To PARI — PARI WebSite Dedicated to providing research and educational access to radio and optical astronomy for a broad cross-section of users. http://www.pari.edu/

Skip to content. Skip to navigation Site Map Accessibility ... Contact Search Site PARI WebSite Sections Home for general public for news media for teachers and students ... for scientists Personal tools Log in You are here: Home Navigation Home About PARI ... News WEEKEND STAR PARTY OFFERED AT PARI LEONID METEORS TO BE VISIBLE Document Actions Welcome to PARI Where Science Excites the Imagination. PARI is a Not-For-Profit Foundation which relies on generous contributions from our FRIENDS to support our mission. What's New at PARI - November 8 - November 12, 2010 IMPORTANT LINKS REGISTER for November 12th Evening at PARI REGISTER for November 30th and Future SciGirls Programs INFORMATION and REGISTRATION for Dec 9-12 Star Party PARI SKY - The Most Recent On-Line Optical Telescope See PHOTOS of PARI at USA Science and Engineering Festival EXPO Click NEWS ABOUT PARI to read recently published articles 2010 PARI Summer Student Research Proceedings DISTINGUISHED SUPPORTERS RECOGNIZED PARI's 2009 Annual Report and  Summer 2010 VIEW Newsletter Available On-Line Successful Homeschool Day at PARI Last Friday The topic for last Friday's Homeschool Day at PARI was Climate Science. For this Homeschool Day the PARI staff was joined by faculty and graduate students from Appalachian State University, who had also conducted a Climate Camp this past summer at PARI (See the story below). Click

95. NRAO: Socorro, New Mexico Current events, public outreach, very large array, VLA expansion project, and very long baseline array. http://www.aoc.nrao.edu

National Radio Astronomy Observatory NRAO Home Current Events Public Outreach: Frequently Asked Questions Press Releases Introduction to Radio Astronomy For Visitors: Official Visitors Tourists Very Large Array VLA Expansion Project (EVLA) ... Assistant Director's Page Updated 2008-Sep-26 Socorro, New Mexico Socorro, New Mexico, is the home of NRAO operations in New Mexico. Located on the campus of New Mexico Tech , the Array Operations Center houses scientific, engineering, technical, computer and support staff for both the Very Large Array and the Very Long Baseline Array. It includes the control center and correlator for VLBA observations and provides space for the Atacama Large Millimeter Array project. The Very Large Array (VLA) , one of the world's premier astronomical radio observatories, consists of 27 radio antennas in a Y-shaped configuration on the Plains of San Agustin 80 km (50 miles) miles west of Socorro, New Mexico. Each antenna is 25 meters (82 feet) in diameter. The data from the antennas is combined electronically to give the resolution of an antenna 36km (22 miles) across, with the sensitivity of a dish 130 meters (426.5 feet) in diameter. Twilight at The Very Large Array, near Socorro, New Mexico

96. UK AMATEUR RADIO ASTRONOMY NETWORK Amateur radio astronomy mainly for, but not limited to, the United Kingdom, providing information for beginners, project ideas, articles, and downloadable archive material. http://www.ukaranet.org.uk

97. Basics Of Radio Astronomy Workbook developed to support training for the Goldstone-Apple Valley Radio Telescope, but can be applied to all. http://www2.jpl.nasa.gov/radioastronomy/

This workbook, although applicable to all radio astronomy, was developed to support training for the Goldstone-Apple Valley Radio Telescope. What is the Goldstone-Apple Valley Radio Telescope? What's the purpose of this "workbook"? Download Basics of Radio Astronomy (.pdf) This workbook was prepared by Diane Fisher Published by Jet Propulsion Laboratory Mission Execution and Automation Section Customer Integration Services Group Document No. JPL D-13835

98. EME, SETI, Radio Astronomy And DSP For Radio Amateurs (W6/PA0ZN) Dedicated to building bridges between amateur groups and the promotion and preservation of weaksignal communication. http://www.nitehawk.com/rasmit/

99. Radio Astronomy Telescope Project Construction of the antenna, system descriptions, objectives, typical results, and references. http://www.signalone.com/radioastronomy/telescope/

Project Page http://www.SignalONE.com/radioastronomy/telescope/ 5.2 Meter Radio Astronomy Project for 1420 MHz This is a description of my 1420 MHz radio telescope project for observing the natural radio emissions of neutral hydrogen atoms found throughout space. Specifically, the study of the radio spectra of these emissions is used to determine the distribution and dynamics of hydrogen throughout our galaxy. Hello, Everyone! I have been interested in radio astronomy for years but have only recently been able to find the time to assemble my own radio telescope. I have completed construction of a 5.2 meter antenna which I use to detect the 1420 Mhz radio emissions of neutral hydrogen found throughout the galaxy. I have included some information on construction and sources of material, and there is also a description of how I am using it and what type of information can be gained from these types of observations. It is my hope that this information will be helpful to others who are interested in radio astronomy or who may even be considering a project of their own. The antenna has a computer controlled Az-El mount and was built mostly from recycled C-band satellite TV components. The elevation drive was once a horizon-to-horizon drive for a 16-foot satellite TV antenna and has an integral worm drive. It is driven by a 90-vdc linear actuator motor/gearbox. The azimuth drive is a roller-chain arrangement driven by another worm drive. This worm drive is also driven by a linear actuator motor/gearbox. The antenna uses a potentiometer for azimuth position feedback which produces a voltage ratio read by a "data acquisition" board on an old 286 PC. Elevation position is obtained by using a

100. ERAC - The European Radio Astronomy Club Observations, workshop, groups, telescopes and images, and radar links. http://www.eracnet.org/

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