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<a accesskey="1" href="page.php?w=space_telescope&amp;p=7">1.Previous</a><br />
<a accesskey="3" href="page.php?w=space_telescope&amp;p=9">3.Next</a>
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<p>with <a href="page.php?w=adaptive_optics">adaptive optics</a>.</p>

<p>Space-based astronomy is more important for frequency ranges that are outside the <a href="page.php?w=optical_window">optical window</a> and the <a href="page.php?w=radio_window">radio window</a>, the only two wavelength ranges of the <a href="page.php?w=electromagnetic_spectrum">electromagnetic spectrum</a> that are not severely attenuated by the atmosphere. Since the Earth's atmosphere blocks <a href="page.php?w=X-rays">X-rays</a>, and also largely blocks <a href="page.php?w=infrared">infrared</a></p><p>
<a accesskey="1" href="page.php?w=space_telescope&amp;p=7">1.Previous</a><br />
<a accesskey="3" href="page.php?w=space_telescope&amp;p=9">3.Next</a>
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