Author Archives: siyuan2016

Propulsion Methods

Posted on April 25, 2016 by siyuan2016

Image Source In the class, we talk about the measures to accelerate spacecraft and satellites that one day may make interstellar travel possible for humans in their lifetime. And in this blog I would like to introduce some other practical and hypothetical propulsion methods. The first method is a practical one called ion thruster, a […] Continue reading →

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Leonids

Posted on April 10, 2016 by siyuan2016

image source The Leonids is a meteor shower associated with the comet Tempel-Tuttle. It gets its name from the location of its apparent radiant in the constellation Leo and has been famous for its most spectacular meteor storms since its identification in 1833. Since comet Tempel-Tuttle is a periodic comet with an orbital period of […] Continue reading →

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Extrasolar planets

Posted on April 10, 2016 by siyuan2016

image source In the class, we learn about the astrometric technique, Doppler technique and direct imaging used to detect extrasolar planets. And in this blog, I’d like to introduce some other planet-hunting strategies that have proved to be applicable. The first method is called gravitational microlensing. A gravitational microlensing occurs only when two stars are […] Continue reading →

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Extrasolar planets

Posted on April 10, 2016 by siyuan2016

image source In the class, we learn about the astrometric technique, Doppler technique and direct imaging used to detect extrasolar planets. And in this blog, I’d like to introduce some other planet-hunting strategies that have proved to be applicable. The first method is called gravitational microlensing. A gravitational microlensing occurs only when two stars are […] Continue reading →

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Climate Change

Posted on March 16, 2016 by siyuan2016

Image Source Volcano activity is one of the most important factors that affect global climate change. Strong volcanic eruptions will release huge amounts of SO2 and sulfate aerosols that will strongly absorb solar radiation into the stratosphere, creating a global layer of sulfuric acid haze and cooling the Earth’s climate for more than 1 year. […] Continue reading →

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Climate Change

Posted on March 16, 2016 by siyuan2016

Image Source Volcano activity is one of the most important factors that affect global climate change. Strong volcanic eruptions will release huge amounts of SO2 and sulfate aerosols that will strongly absorb solar radiation into the stratosphere, creating a global layer of sulfuric acid haze and cooling the Earth’s climate for more than 1 year. […] Continue reading →

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Nuclear Fusion

Posted on March 16, 2016 by siyuan2016

Image Source Since the discovery of nuclear fission and nuclear fusion, people have thought to use nuclear reactions that release energy to generate heat for industrial production. Up to 2015, nuclear power has provided more than 10% of world’s electricity. Since fusion involves the merging of atomic nuclei and it’s so hard to get it […] Continue reading →

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Nuclear Fusion

Posted on March 16, 2016 by siyuan2016

Image Source Since the discovery of nuclear fission and nuclear fusion, people have thought to use nuclear reactions that release energy to generate heat for industrial production. Up to 2015, nuclear power has provided more than 10% of world’s electricity. Since fusion involves the merging of atomic nuclei and it’s so hard to get it […] Continue reading →

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Telescope

Posted on February 16, 2016 by siyuan2016

image source Throughout human history, the invention and improvement of telescope occupied an indispensable place in the advancement of astronomy. And this blog is devoted to introducing  the history of telescope in last four hundred years. The earliest known workingtelescopewas created by Hans Lippersheyin 1608 to “see things far away as if they are nearby”. […] Continue reading →

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Celestial Navigation

Posted on February 16, 2016 by siyuan2016

Navigational Compass used in Ming Dynasty      image source Before the invention of artificial satellites and development of data transformation, celestial navigation played an indispensable role in human’s exploration and discovery of newfound lands. And in this blog, I would like to introduce some celestial navigating technologies implemented in Zheng He’s treasury voyage, one […] Continue reading →

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