在天文學裡，合相是指從一個特定天體（例如地球）觀察到兩個天體在天空上的位置非常靠近。合相發生的時候這兩個被觀察的天體的位置有相同的赤經或黃經。而「大合相」就是指木星和土星的合相，被冠名為「大」是因為木星合土星是至今最罕見的目視行星合相。2020年12月，香港的上空便出現了一次罕見的大合相…
Tag: Astronomy
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Geminid Meteor Shower 2020
Every year, Geminid meteor shower is active during the period from early to mid-December. The peak this year is expected to occur from the night on 13 December to the morning on 14 December. The Zenithal Hourly Rate is projected to be as high as 150…
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Interview with 2015 Shaw Laureate – Mr William J BORUCKI
The Shaw Prize in Astronomy 2015 was awarded to astronomer and space
scientist Mr William J Borucki for his work in conceiving and
leading the Kepler Mission, which greatly advanced our knowledge of both
extrasolar planetary systems and stellar interiors… -
Interview with 2018 Shaw Laureate – Prof Jean-Loup Puget
The Shaw Prize in Astronomy 2018 was awarded to Prof Jean-Loup Puget for his contributions to astronomy in the infrared to submillimetre spectral range