Weblinks in astronomy

Galaxies images (spirals, ellipticals, etc)

• http://www.noao.edu/image_gallery/


• The Virgo cluster of galaxies
  http://www.atlasoftheuniverse.com/galgrps/vir.html


• Spiral galaxies: star formation and spiral arms, density wave theory
  http://ircamera.as.arizona.edu/


• Images of galaxies (ESO)
  http://www.eso.org/esopia/images/archive/subtopic/galaxies/

Exo-planets

• The Geneva Extrasolar Planet Search Programmes
  http://obswww.unige.ch/~udry/planet/planet.html


• The first extrasolar planet around a solar-type star
  http://obswww.unige.ch/~udry/planet/51peg.html


• Links to exoplanets related sites
  http://obswww.unige.ch/~udry/planet/link_exoplanet.html


• Search for Extrasolar Planets (G. Marcy)
  http://exoplanets.org/


• The Extrasolar Planets Encyclopedia
  http://exoplanet.eu


• How planet hunting works
  http://science.howstuffworks.com/planet-hunting2.htm

N-body simulations

• The millenium cosmological N--body simulation
  http://www.mpa-garching.mpg.de/galform/millennium/


• Galaxy N-body simulations (stars and gas) of our Galaxy, the Milky Way http://obswww.unige.ch/~fux/hydro.htm


• N-body simulations of merging galaxies by John Dubinksi http://www.cita.utoronto.ca/~dubinski/nbody/
  http://www.cita.utoronto.ca/~dubinski/tflops/
  http://www.galaxydynamics.org/


• Galaxy collisions
  http://www.etsu.edu/physics/bsmith/collisions/collisions.html


• Models of interacting galaxies by Josh Barnes
  Click here

Maps of peculiar galaxies

• HI Rogues gallery (maps of peculiar galaxies, galaxy interaction)
  http://www.nrao.edu/astrores/HIrogues/webGallery/index.html

Powers of ten

• 'Powers of Ten': a famous movie made in 1977 by Charles and Ray Eames (IBM), with english commentary here, also available here (9 min).


• http://csaweb.yonsei.ac.kr/~rhee/2000/universe/power10.html: Korean webpage with clickable images from "Powers of Ten, the movie by Charles & Ray Eames (IBM)", which is "10ÀÇ Á¦°ö¼öµé: Çʸ³°ú Çʸ®½º ¸ð¸®½º ÁöÀ½, ¹ÎÀ½»ç (ºñµð¿À)" in korean, in case you're lost...(your browser needs Korean Text Encoding)


• http://www.wordwizz.com/pwrsof10.htm: more modern version of the 'Powers of Ten', no animation: skip from -3 to +3 on a log. scale, viewing a series of pictures centered on a flower. (Copyright 2005-07 by Bruce Bryson)


• http://micro.magnet.fsu.edu/primer/java/scienceopticsu/powersof10/: nice java animation, also manually clickable. (Copyright 1995-2007 by Michael W. Davidson and The Florida State University)

The SLOAN sky survey

• Full color images of over 80 million objects
• Complete photometric (imaging) data for every object
• Spectra of over 180,000 objects
• Access to data on almost every type of astronomical object

• The Hubble Diagram
• Colors in Astronomy
• Spectral Types of Stars
• Image Processing
• Asteroids
• The H-R Diagram
• Galaxies
• Sky Surveys
• Quasars

Astronomy class in italian (University of Padova)

Planets of our Solar System

Recent MARS missions

Cassini-Huygens mission to Saturn and Titan

Hubble Space Telescope (HST)

• Institute for the Hubble Space Telescope: the Space Telescope Science Institute http://www.stsci.edu


• Nice images from HST (galaxies, stars, spacecraft, etc)
  http://hubblesite.org/
  http://hubblesite.org/gallery/album/


• The European Homepage for HST (webpage with a lot of pictures, videos, posters of HST observations)
  http://www.spacetelescope.org/


• Ultra Deep Field (UDF) observed by HST
  http://www.stsci.edu/hst/udf


• Skywalker across the UDF
  http://www.aip.de/groups/galaxies/sw/udf/index.php


• Images and video of UDF
  http://www.spacetelescope.org/news/html/heic0406.html

ESO, Paranal and the VLT

• ESO (European Southern Observatory)
  http://www.eso.org


• Very Large Telescope (VLT): Paranal Observatory http://www.eso.org/public/astronomy/teles-instr/paranal.html


• VLT Astronomical Images: Solar system - Stars - Star Clusters -
  Nebulae - Galaxies - Galaxy clusters - Cosmology - Spectra - Graphs etc... http://www.eso.org/esopia/


• VLT at Wikipedia (in italian)
  http://it.wikipedia.org/wiki/VLT

FAQ (Frequently Asked Questions) about the Universe, the Big bang, etc)

Black Holes

• M87 Cosmic Jet
  http://www.nrao.edu/pr/1999/m87/
  http://www.space.com/


• Supernovae phenomenon
  http://nrumiano.free.fr/Estars/supernova.html


• nice site with FAQ about Black Holes:
  http://amazing-space.stsci.edu/


• Voyage to a BH. Gravity's relentless pull interactive webpage: http://hubblesite.org/explore_astronomy/black_holes/


• BH small encyclopedia (nature, formation and existence of BHs): http://hubblesite.org/explore_astronomy/black_holes/

Doppler Shift, redshift:

• http://www.astro.ucla.edu/~wright/doppler.htm


• Doppler effect and sonic booms: v < v-sound, v=v-sound and v > v-sound: http://www.kettering.edu/~drussell/Demos/doppler/


• Light as an electromagnetic wave: propagation, wavelength, spectral lines, galaxy spectra (Sloan Survey):
  http://www.colorado.edu/physics/2000/waves_particles/ http://www.phy.ntnu.edu.tw/ntnujava/viewtopic.php?t=52 http://www.colorado.edu/physics/2000/quantumzone/bohr.html http://www.colorado.edu/physics/2000/quantumzone/index.html http://cas.sdss.org/dr4/en/proj/advanced/galaxies/spectra.asp


• Solar spectrum - applet for the stellar flux for 3 different temperatures http://astro.unl.edu/naap/ebs/spectraltype.html

The Slingshot effect

• http://www.dur.ac.uk/bob.johnson/SL/1.html


• Double ball drop - slingshot effect
  http://hyperphysics.phy-astr.gsu.edu/hbase/doubal.html