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An aurora [a] (pl. aurorae or auroras), [b] also commonly known as the northern lights (aurora borealis) or southern lights (aurora australis), [c] is a natural light display in Earth's sky, predominantly seen in high-latitude regions (around the Arctic and Antarctic). Auroras display dynamic patterns of brilliant lights that appear as curtains ...
More recently, in 2024, two studies found evidence for a companion star. One study found that a not yet directly-observed, dust-modulating star or white dwarf of 1.17 ± 0.07 M ☉ at a distance of 8.60 ± 0.33 AU would be the most likely solution for Betelgeuse's 2170-day secondary periodicity, fluctuating radial velocity, moderate radius and ...
These astronomical tables were used and updated during the following three centuries, as the main source of astronomical data, mainly to calculate ephemerides (which were in turn used by astrologers to cast horoscopes). [55] c. 1300 – Jewish astronomer Levi ben Gershon (Gersonides) recognized that the stars are much larger than the planets ...
On January 25–26, 1938, the sky was lit up with an aurora borealis light storm, seen all across the world. The storm was identical to other storm-induced, low-latitude aurora borealis. The great aurora that was witnessed across Europe, the Americas, and Oceania had not been seen/documented in Europe since 1709, and in the Americas since 1888.
Americans in at least 17 states will have a chance to see the northern lights Thursday night. The following continental U.S. states fall within aurora’s view line: Washington
Scientists at the European Southern Observatory, or ESO, say a yellow. There are somewhere around 300 billion stars in our galaxy, so if the discovery of a single star is enough to make headlines ...
Tips for viewing the northern lights "Go out at night," NOAA said. "And get away from city lights." The best aurora is usually within an hour or two of midnight (between 10 p.m. and 2 a.m. local ...
In modern terms, this corresponds to early B-type stars Secchi class II: Yellow stars – hydrogen less strong, but evident metallic lines, such as the Sun, Arcturus, and Capella. This includes the modern classes G and K as well as late class F. Secchi class III: Orange to red stars with complex band spectra, such as Betelgeuse and Antares.