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In astronomy, coordinate systems are used for specifying positions of celestial objects (satellites, planets, stars, galaxies, etc.) relative to a given reference frame, based on physical reference points available to a situated observer (e.g. the true horizon and north to an observer on Earth's surface). [1]
Messier 2 is located within our Milky Way galaxy, and is one of the oldest clusters of stars designated to the Milky Way. Like most globular clusters, M2 is found within the galactic halo, specifically in the southern galactic cap. This places it right below the southern pole of the Milky Way. [14]
The planets orbit the host star in synchronized rhythms of orbital resonance (a rare 1 percent of such systems in the Milky Way galaxy have this symmetry): the innermost planet orbits three times for every two times for the next planet out – a so-called 3:2 resonance; this same 3:2 resonance also applies to the second and third planet, as ...
Four planets are a small alignment, which we saw during April 8’s eclipse. Large alignments, like the one we're seeing this June, contain five to six planets. A great or full alignment includes ...
NGC 7217 is a gas-poor system [2] whose main features are the presence of several rings of stars concentric to its nucleus: three main ones –the outermost one being of the most prominent and the one that features most of the gas and star formation of this galaxy – [2] plus several others inside the innermost one discovered with the help of the Hubble Space Telescope; a feature that ...
A video showing in 3D Laniakea and other nearby superclusters of galaxies. The Laniakea Supercluster encompasses approximately 100,000 galaxies stretched out over 160 Mpc (520 million ly). It has the approximate mass of 10 17 solar masses, or 100,000 times that of our galaxy, which is almost the same as that of the Horologium Supercluster. [3]
These multi-planet viewing opportunities aren’t super rare, but they don’t happen every year, so it’s worth checking it out.” Mars, Jupiter, Saturn, and Venus will be visible with the ...
Mercury, Venus, Mars, Jupiter and Uranus will appear to be in a near-straight line, according to Star Walk Space. The last time multiple planets lined up in a similar pattern was in early June ...