Search results
Results from the Health.Zone Content Network
Hubble sequence. The Hubble sequence is a morphological classification scheme for galaxies published by Edwin Hubble in 1926. [1][2][3][4] It is often colloquially known as the Hubble tuning-fork diagram because the shape in which it is traditionally represented resembles a tuning fork. It was invented by John Henry Reynolds and Sir James Jeans.
Galaxy morphological classification is a system used by astronomers to divide galaxies into groups based on their visual appearance. There are several schemes in use by which galaxies can be classified according to their morphologies, the most famous being the Hubble sequence , devised by Edwin Hubble and later expanded by Gérard de ...
Elementary schools (Korean: 초등학교, 初等學校, chodeung hakgyo) consists of grades one to six (age 8 to age 13 in Korean years —7 to 12 in western years). The South Korean government changed its name to the current form from Citizens' school (Korean: 국민학교, 國民學校. In elementary school, students learn the following subjects.
Twelfth grade (also known as 12th grade, grade 12, senior year, or class 12) is the twelfth and final year of formal or compulsory education. It is typically the final year of secondary school and K–12 in most parts of the world. Students in twelfth grade are usually 17–18 years old. Some countries have a thirteenth grade, while other ...
Galactic astronomy is the study of the Milky Way galaxy and all its contents. This is in contrast to extragalactic astronomy, which is the study of everything outside our galaxy, including all other galaxies. Galactic astronomy should not be confused with galaxy formation and evolution, which is the general study of galaxies, their formation ...
In the Republic of Ireland, there are two levels of compulsory education; primary school (ca.4–12 years of age) and secondary school (ca.12–18 years). The names of each class are as follows: Junior Infants (4–5 years) Senior Infants (5–6 years) First Class (6–7 years) Second Class (7–8 years) Third Class (8–9 years)
Enterprise. (NCC-1701-D) USS Enterprise (NCC-1701-D), or Enterprise-D, to distinguish it from other vessels with the same name, is a starship in the Star Trek media franchise. Under the command of Captain Jean-Luc Picard, it is the main setting of Star Trek: The Next Generation (1987–1994) and the film Star Trek Generations (1994). It has ...
The Condor Galaxy is a colossal spiral galaxy disturbed by the smaller IC 4970. It is the largest known spiral galaxy with the isophotal diameter of over 717,000 light-years (220 kiloparsecs). [1] Galaxies are vast collections of stars, planets, nebulae and other objects that are surrounded by an interstellar medium and held together by gravity.