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The two Magellanic Clouds were believed to be the closest galaxies to our own until 1994, when the '''Sagittarius Dwarf Elliptical''' galaxy was discovered. The two galaxies themselves appear 21° apart in the night sky.
The two Magellanic Clouds were believed to be the closest galaxies to our own until 1994, when the '''Sagittarius Dwarf Elliptical''' galaxy was discovered. The two galaxies themselves appear 21° apart in the night sky.
In 2007, a team of astronomers from the Harvard-Smithsonian Center for Astrophysics, using input from the [[Hubble Telescope]] accurately measured both the radial and proper velocity of the Magellanic Clouds, which clocked their passage through the region of our galaxy at over 480 km/s. Due to this high relative velocity, it is now believed that the two galaxies are not gravitationally bound satellites of the [[Milky Way]], as once believed, thus requiring a revision of many of the previously assumed effects they have on the Milky Way.<ref>Besla, G., Kallivayalil, N., Hernquist, L., Robertson, B., Cox, T., van der Marel, R. and Alcock, C. (2007). Are the Magellanic Clouds on Their First Passage about the Milky Way?. ''The Astrophysical Journal'', 668(2), pp.949-967. [http://arxiv.org/abs/astro-ph/0703196 arXiv:astro-ph/0703196]</ref><ref>[http://www.cfa.harvard.edu/news/2007/pr200722.html The Magellanic Clouds Are First-Time Visitors] from cfa.harvard.edu</ref>
In 2007, a team of astronomers from the Harvard-Smithsonian Center for Astrophysics, using input from the [[Hubble Telescope]] accurately measured both the radial and proper velocity of the Magellanic Clouds, which clocked their passage through the region of our galaxy at over 480 km/s. Due to this high relative velocity, it is now believed that the two galaxies are not gravitationally bound satellites of the [[Milky Way]], as once believed, thus requiring a revision of many of the previously assumed effects they have on the Milky Way.<ref>Besla, G., Kallivayalil, N., Hernquist, L., Robertson, B., Cox, T., van der Marel, R. and Alcock, C. (2007). Are the Magellanic Clouds on Their First Passage about the Milky Way?. ''The Astrophysical Journal'', 668(2), pp.949-967. [https://arxiv.org/abs/astro-ph/0703196 arXiv:astro-ph/0703196]</ref><ref>[http://www.cfa.harvard.edu/news/2007/pr200722.html The Magellanic Clouds Are First-Time Visitors] from cfa.harvard.edu</ref>
===Large Magellanic Cloud===
===Large Magellanic Cloud===