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	<title>2015IOAA理论短问题第4题-观测黑洞 - 版本历史</title>
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	<updated>2026-05-04T08:42:15Z</updated>
	<subtitle>本wiki的该页面的版本历史</subtitle>
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		<id>https://www.astro-init.top/index.php?title=2015IOAA%E7%90%86%E8%AE%BA%E7%9F%AD%E9%97%AE%E9%A2%98%E7%AC%AC4%E9%A2%98-%E8%A7%82%E6%B5%8B%E9%BB%91%E6%B4%9E&amp;diff=2170&amp;oldid=prev</id>
		<title>某九流辣鸡民科：创建页面，内容为“==英文题目== Let us assume that an observer using a hypothetical, far-infrared, Earth-sized telescope (wavelength range 20 to 640 $$\mu m$$) found a static and n…”</title>
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		<updated>2022-03-18T12:26:50Z</updated>

		<summary type="html">&lt;p&gt;创建页面，内容为“==英文题目== Let us assume that an observer using a hypothetical, far-infrared, Earth-sized telescope (wavelength range 20 to 640 $$\mu m$$) found a static and n…”&lt;/p&gt;
&lt;p&gt;&lt;b&gt;新页面&lt;/b&gt;&lt;/p&gt;&lt;div&gt;==英文题目==&lt;br /&gt;
Let us assume that an observer using a hypothetical, far-infrared, Earth-sized telescope (wavelength range 20 to 640 $$\mu m$$) found a static and neutral supermassive black hole with a mass of $$2.1 \times 10^{10} M_{\odot}$$. Determine the maximum distance at which this black hole can be resolved by the observer.&lt;/div&gt;</summary>
		<author><name>某九流辣鸡民科</name></author>
		
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