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Angular distance
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#	Item
21	16 Eagle Nebula - Closeup The Hubble Space Telescope took the image of the Eagle Nebula (M16). This star-forming region is in the constellation Serpens, and located 6,500 light years from Earth. It is only about 6 milli Add to Reading List Source URL: spacemath.gsfc.nasa.gov Language: English - Date: 2009-01-01 10:37:00 NGC objects Planetary nebulae Angle Angular diameter Elementary geometry Light-year Hubble Space Telescope Cosmic distance ladder Solar System Astronomy Space Astrometry
22	Angular Size and Velocity The relationship between the distance to an object, R, the objects size, L, and the angle that it subtends at that distance,  is given by: Add to Reading List Source URL: spacemath.gsfc.nasa.gov Language: English - Date: 2013-09-09 12:33:12 Ballistics Minute of arc Manned spacecraft Angular diameter International Space Station Spaceflight Angle Astrometry
23	Chandra Explores Angular Size 26 Astronomers measure the sizes of objects in the sky in terms of their angular size. For instance, the moon Add to Reading List Source URL: www.chandra.harvard.edu Language: English - Date: 2011-10-05 09:52:23 Angle Angular diameter Elementary geometry Minute of arc Light-year Cosmic distance ladder Star Astronomy Astrometry Space
24	A The Astrophysical Journal, 683:424Y432, 2008 August 10 # 2008. The American Astronomical Society. All rights reserved. Printed in U.S.A. ANGULAR DIAMETERS OF THE G SUBDWARF CASSIOPEIAE A AND THE K DWARFS DRACONIS Add to Reading List Source URL: www.chara.gsu.edu Language: English - Date: 2008-09-23 14:29:21 Star types Star Hertzsprung–Russell diagram Stellar classification Cosmic distance ladder Binary star Extrasolar planet Effective temperature Astronomy Space Stellar astronomy
25	c ESO 2005 The projection factor of δ Cephei A calibration of the Baade-Wesselink method using the CHARA Array A. Mérand1 , P. Kervella1 , V. Coudé du Foresto1 , S. T. Ridgway1,2,3 , J. P. Aufdenberg2 , T. A. ten B Add to Reading List Source URL: www.chara.gsu.edu Language: English - Date: 2005-09-08 10:24:10 Variable stars Space Astrophysics Cepheid variables Classical Cepheid variable Cosmic distance ladder Angular diameter Star Type II Cepheid Astrometry Standard candles Astronomy
26	I ntroduction Busy educators sometimes have trouble finding ways to help their students feel the excitement of science in action. As a part of Add to Reading List Source URL: www-glast.sonoma.edu Language: English - Date: 2009-09-11 13:17:07 Galaxies Astrophysics Local Group Spiral galaxies Angular diameter Supermassive black hole Cosmic distance ladder Milky Way Gamma-ray burst Astronomy Space Astrometry
27	Getting an Angle on the Sun and Moon The Sun (Diameter = 1,400,000 km) and Moon (Diameter = 3,476 km) have very different physical diameters in kilometers, but in the sky they can appear to be nearly the same size. Astr Add to Reading List Source URL: spacemath.gsfc.nasa.gov Language: English - Date: 2012-08-01 05:44:22 Space Angle Ballistics Minute of arc Angular diameter Moon Mare Serenitatis Sun Cosmic distance ladder Astrometry Astronomy Physics
28	www.exploratorium.edu/geometryplayground/activities Handy Measuring Ratio Use your hand as a tool for indirect measurement. Materials Add to Reading List Source URL: www.exploratorium.edu Language: English - Date: 2014-11-13 15:03:58 Astronomy Astrometry Euclidean geometry Angular mil Decimalisation Length Cosmic distance ladder Measuring instrument Similarity Geometry Triangles Measurement
29	Chandra Explores Angular Size 26 Astronomers measure the sizes of objects in the sky in terms of their angular size. For instance, the moon Add to Reading List Source URL: xrtpub.harvard.edu Language: English - Date: 2011-10-05 09:52:23 Angle Angular diameter Elementary geometry Minute of arc Light-year Cosmic distance ladder Star Astronomy Astrometry Space
30	Dive and Discover: Puzzle Stumper #2 Hint: All answers found within Expedition 9 and Deeper Discovery[removed] Add to Reading List Source URL: divediscover.whoi.edu Language: English - Date: 2013-12-04 14:28:18 Matter Manned spacecraft Space Shuttle Atlantis Minute of arc Angular distance Hydrogen Chemistry Astrometry Angle

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