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Description. Three Stars and Sun (Azkals).svg. English: Three Stars and the Sun motif used for the Philippine national football team's kits made by LGR Athletics Inc. released in June 3, 2015. Date. 4 June 2015. Source. Own work, Based from Flag of the Philippines 5 10 15.svg uploaded by Achim1999. As seen at the Twitter post by Team Manager ...
Proper motion may alternatively be defined by the angular changes per year in the star's right ascension ( μα) and declination ( μδ) with respect to a constant epoch . The components of proper motion by convention are arrived at as follows. Suppose an object moves from coordinates (α 1, δ 1) to coordinates (α 2, δ 2) in a time Δ t.
The Vergina Sun ( Greek: Ήλιος της Βεργίνας, romanized : Ilios tis Vergínas, lit. 'Sun of Vergina'), also known as the Star of Vergina, Vergina Star or Argead Star, is a rayed solar symbol first appearing in ancient Greek art of the period between the 6th and 2nd centuries BC. The Vergina Sun proper has sixteen triangular rays ...
Alpha Centauri AB (left) forms a triple star system with Proxima Centauri (bottom to the α Centauri AB system), circled in red. The bright star system to the right is Beta Centauri. Alpha Centauri ( α Centauri, α Cen, or Alpha Cen) is a triple star system in the southern constellation of Centaurus. It consists of three stars: Rigil Kentaurus ...
Retrograde motion in astronomy is, in general, orbital or rotational motion of an object in the direction opposite the rotation of its primary, that is, the central object (right figure). It may also describe other motions such as precession or nutation of an object's rotational axis. Prograde or direct motion is more normal motion in the same ...
In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, describe the orbits of planets around the Sun. The laws modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary.
Below are lists of the largest stars currently known, ordered by radius and separated into categories by galaxy. The unit of measurement used is the radius of the Sun (approximately 695,700 km ; 432,300 mi ).
The closest encounter to the Sun so far predicted is the low-mass orange dwarf star Gliese 710 / HIP 89825 with roughly 60% the mass of the Sun. [4] It is currently predicted to pass 0.1696 ± 0.0065 ly (10 635 ± 500 au) from the Sun in 1.290 ± 0.04 million years from the present, close enough to significantly disturb the Solar System's Oort ...