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A remnant planetary core in the hot Neptunian desert

The interiors of giant planets remain poorly understood. Even for the planets in the Solar System, difficulties in observation lead to major uncertainties in the properties of planetary cores....

第二次世界大战大事记

View this term in the glossary 1931 年 9 月 18 日 日本入侵满洲。 1935 年 10 月 2 日至 1936 年 5 月 意大利法西斯入侵、占领并吞并了埃塞俄比亚。 1936 年 10 月 25 日至 11 月 1 日 纳粹德国与意大利法西斯于 10 月 25 日签署合作条约。11 月 1 日，罗马-柏林轴心国宣告成立。 1936 年 11...

First Congress of the Communist International

NOTES [172] The First Congress of the Communist International met in Moscow from March 2-6, 1919. In January 1919 a meeting of representatives from a number of Communist Parties and Left-wing...

Magnetic Field of the Earth

The Earth's magnetic field is similar to that of a bar magnet tilted 11 degrees from the spin axis of the Earth. The problem with that picture is that the Curie temperature of iron is about 770 C . The...