2020年长春退休金计算方法公布表

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International Olympiad on Astronomy and Astrophysics

Summary ... ^ Due to the COVID-19 pandemic, IOAA 2020 was replaced by an online competition: the Global e-Competition on Astronomy and Astrophysics (GeCAA). ^ The GeCAA was organized by the IOAA International Board wi...

www.nationalacademies.org

Decadal Survey on Astronomy and Astrophysics 2020 (Astro2020)

Pathways to Discovery in Astronomy and Astrophysics for the 2020s identifies the most compelling science goals and presents an ambitious program of ground- and space-based activities for future investment in the next ...

ioanazelko.com

The first Global e-Competition on Astronomy and Astrophysics

In this paper, we present the results of the inaugural Global e-Competition on Astronomy and Astrophysics, which took place online in September–October 2020 as a replacement for the International Olympiad on Astronomy...

en.wikipedia.org

2020 - Wikipedia

2020 (MMXX) was a leap year starting on Wednesday of the Gregorian calendar, the 2020th year of the Common Era (CE) and Anno Domini (AD) designations, the 20th year of the 3rd millennium and the 21st century, and the ...