Helin is a prolific discoverer of minor planets (see list) and several comets, including periodic comets 111P/Helin–Roman–Crockett, 117P/Helin–Roman–Alu and 132P/Helin–Roman–Alu. She is credited as the discoverer of the object now known as both asteroid 4015 Wilson...
Caroline Lucretia Herschel (; 16 March 1750 – 9 January 1848) was a German astronomer, whose most significant contributions to astronomy were the discoveries of several comets, including the periodic comet 35P/Herschel–Rigollet, which bears her name. She was the younger sister of astronomer Wil...
英文 国际语 tabella plwiktionary.org 显示算法生成的翻译 具有替代拼写的翻译 List A SmartArt graphic layout type that includes layouts designed to show nonsequential information. +添加翻译 英文- 国际语 词典中的“List" 目前我们的字典中没有List的翻译,也许你可以添加一个?确保检查自动翻译、翻译记忆库或...
The orbits of three periodic comets, Halley, Borrelly and Ikeya–Zhang, set against the orbits of the outer planets. Ikeya–Zhang is to the right. 太阳系天体轨道参照重心的逐年变化Motion of the Solar System's barycenter relative to the Sun 太阳系中的彗星被认为有两个独立的起源地。短周期彗星(...
This KDE app allows students to explore the periodic table, and it comes complete with a molecular weight calculator, an isotope table, a 3D molecule editor and an equation solver for stoichiometric problems. (Note that in order to use Kalzium on Windows, you’ll have to download KDE for ...
Comets plunge into the Sun, some just graze it. Others, like Halley's Comet every 76 years, make regular periodic appearance in our skies. Comets are from the Kuiper Belt and the Oort Cloud, a vast halo of debris that stretches a third of the way to the nearest star. Rate S1.E14 ...
The star is a very fast spinner, with a projected rotational velocity of 250 km/s. It shines with a luminosity of 130 Suns and has an estimated age of only 80 million years. Beta Librae is catalogued as a single star, but it shows small periodic variations in luminosity (0.03 of a ...
hydrogen atom spectrum which the Bohr theory was designed to reproduce. That theory refined Ernest Rutherford's and Antonius van den Broek's model, which proposed that the atom contains in its nucleus a number of positive nuclear charges that is equal to its (atomic) number in the periodic ...
He discovered the periodic comet 32P/Comas Solà, and co-discovered the non-periodic comet C/1925 F1 (Shajn-Comas Solà); he is also credited by the Minor Planet Center with the discovery of 11 asteroids during 1915–1930. Comas i Solà is also credited with the discovery of the ...