1 | 2015 | - 6 Mar 2015: NASA's Dawn probe enters orbit around Ceres, becoming the first spacecraft to visit a dwarf planet.
- 25 Apr 2015: A major earthquake in Nepal, measuring 7.8 on the Richter scale, results in nearly 9,000 deaths in Nepal, India, China and Bangladesh.
- 23 May 2015: The Republic of Ireland votes to legalize same-sex marriage, becoming the first country to legalize same-sex marriage by popular vote.
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