Source: NASA/CXC/SAO
Published: December 27, 2017
Cassiopeia A (Cas A) is the remnant of a massive star that exploded about 300 years ago. The X-ray image shows an expanding shell of hot gas produced by the explosion.
Xizang makes headways in intellectual property rights By Palden Nyima and
Daqiong | chinadaily.com.cn | Updated: 2024-04-28 10:53
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*Xizang makes headways in intellectual property rights* By Palden Nyima and
Daqiong | chinadaily.com.cn | Updated: 2024-04-28 10:53
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