Matariki is visible to the unaided eye in the pre-dawn sky from mid to late June each year. Its heliacal rising—occurring around the winter solstice—combined with a specific lunar phase signals the Māori New Year. However, much like Ramadan, Easter, and the Chinese and Indian New Years, the date varies annually based on astronomical and lunar cycles.
(And we can do something about it.)
Life needs CHNOPS, the six essential elements Carbon, Hydrogen, Nitrogen, Oxygen, Phosphorus, and Sulphur. Curiosity found them on ancient Mars, but a new study shows Earth was born without them. Only a lucky impact with Theia made our world habitable. In contrast, Venus never stood a chance. Meet the three planetary siblings and discover why only Earth became a cradle for life.
Mars’s mantle contains ancient fragments up to 4km wide from its formation—preserved like geological fossils from the planet’s violent early history.
Cosmic rays are hitting the atmosphere constantly. One of the products of the collisions is muons, and we can detect muons on the surface of the Earth to learn about the cosmic rays.
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