1909 ⟶ Robert Peary's Claim of Reaching the North Pole
April 6: Robert Peary claims to have reached the North Pole ...
Year
1909
1910
1912
1925
1961
1977
🧭 Robert Peary's Claim of Reaching the North Pole
April 6: Robert Peary claims to have reached the North Pole though the claim is subsequently heavily contested.⟶
ExplorationPolar ExplorationControversyArcticGeography
United States⭐ Williamina Fleming Identifies the First White Dwarf Star
Williamina Fleming: the first white dwarf, 40 Eridani B⟶
AstronomyCosmologyStellar EvolutionAstrophysicsSpectroscopy
United States🔭 Henrietta Swan Leavitt Discovers Cepheid Period-Luminosity Relation
AstronomyCosmologyAstrophysicsEdwin Hubble
United States⚛️ Cecilia Payne-Gaposchkin Determines Solar Composition and Hydrogen Abundance
Cecilia Payne-Gaposchkin: Discovery of the composition of the Sun and that hydrogen is the most abundant element in the Universe⟶
AstronomyCosmologyAstrophysicsElements20th Century Science
United States🚀 Kennedy Announces Moon Landing Goal
May 25: In an address to Congress, John F. Kennedy declares the United States' objective of "landing a man on the Moon and returning him safely to the Earth" by the end of the decade. This would be in fact achieved by the Apollo Project, despite several challenges and much doubt.⟶
Space RaceCold WarJohn F. KennedyExploration
United States