Author Archives: lin0214

Historical Astronomers in Context

Posted on February 4, 2018 by lin0214

Johannes Kepler (December 27, 1571- November 15, 1630), summarized his discoveries with three physical principles. First, the planets move in elliptical orbits, but not perfect circles, with the Sun at one focus. Second, he argued that the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector between … Continue reading Historical Astronomers in Context → Continue reading →

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Historical Astronomers in Context

Posted on February 4, 2018 by lin0214

Johannes Kepler (December 27, 1571- November 15, 1630), summarized his discoveries with three physical principles. First, the planets move in elliptical orbits, but not perfect circles, with the Sun at one focus. Second, he argued that the time necessary to traverse any arc of a planetary orbit is proportional to the area of the sector between … Continue reading Historical Astronomers in Context → Continue reading →

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Some facts about the speed of light

Posted on January 21, 2018 by lin0214

The speed of light is 299,792,458 meters per second (186,282 miles per second), but this is not always the case. The speed of light, which is actually the highest speed that light can reach, has to be in a vacuum.  In other cases, light actually slows down as it passes through different media. For instance, … Continue reading Some facts about the speed of light → Continue reading →

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A picture

Posted on January 19, 2018 by lin0214

    Welcome to my blog.   Continue reading →

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