One large Milky Way galaxy or many galaxies? 100 years ago, a young Edwin Hubble settled astronomy’s ‘Great Debate.’
In 1920, astronomers Harlow Shapley and Heber Curtis held a Great Debate. Shapley argued that the spiral nebulae were small and in the Milky Way, while Curtis took a more radical position that they ...
Astronomy Week 2025 to highlight rare planetary alignment
Irish astronomy week, which begins this weekend and runs to March 8th, will coincide with the “great planetary alignment” taking place in our skies. “The event is planned to coincide with a ...
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Astronomy’s Greatest Hits: The 100 Most Cited Papers in Each Year of the First Decade of the 21st Century (2000–2009)
As Abt (2006b) already pointed out, Table A1 shows that ISI systematically undercounts (or ADS overcounts) citations, with the discrepancy steadily increasing with decreasing age. Although the number ...