1) Periapsis 2) Periapsis in solar orbit 3) Point of periapsis
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https://www.crosswordclues.com/clue/perihelion
Point on a planet?s orbit at which it is nearest the Sun.
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http://jot101.com/2015/05/a-z-of-science-fiction-words/
• (n.) Alt. of Perihelium
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http://thinkexist.com/dictionary/meaning/perihelion/
That point in a solar orbit which is nearest to the Sun.
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http://www.braeunig.us/space/glossary.htm
(from the article `Earth Perihelion and Aphelion, 2008`) ...the focus is the pericentre, or periapsis, and that farthest from it is the apocentre, or apoapsis. Specific terms can be used for individual ... [7 related articles]
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http://www.britannica.com/eb/a-z/p/44
The point in the solar orbit of a planet, comet, or other object when it is nearest to the Sun. The perihelion distance is the distance between the object and the Sun at this point. The time of perihelion passage is the time at which an object is at perihelion.
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http://www.daviddarling.info/encyclopedia/P/perihelion.html
The point in its orbit where a planet is closest to the Sun. when referring to objects orbiting the Earth the term perigee is used; the term periapsis is used for orbits around other bodies. (opposite of aphelion)
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http://www.encyclo.co.uk/local/20040
the time and point where a planet is closest to the Sun; see also aphelion.
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http://www.encyclo.co.uk/local/20417
The position of the Earth (or other planet) in its orbit when it is closest to the Sun.
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http://www.encyclo.co.uk/local/20448
Periapsis in solar orbit.
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http://www.encyclo.co.uk/visitor-contributions.php
The point in its orbit when an object is closest to the Sun.
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http://www.encyclo.co.uk/visitor-contributions.php
The closest point to the Sun in a planetary body's orbit.
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http://www.moonconnection.com/moon-glossary.phtml
It is the point in the Earth's orbit when it is closest to the Sun (147.5 million km). Perihelion occurs on the 3rd or 4th of January.
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http://www.physicalgeography.net/physgeoglos/p.html
The point in the orbit of a planet or other body where it is closest to the Sun.
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http://www.seasky.org/astronomy/astronomy-glossary.html
When the orbit of a planet takes it to the point closest to the Sun.
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http://www.solarspace.co.uk/Glossary3.php
The point in its orbit where a planet is closest to the Sun.
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http://www.solarviews.com/eng/terms.htm
[
n] - periapsis in solar orbit
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http://www.webdictionary.co.uk/definition.php?query=perihelion
perihelion (s), perihelia (pl); perihelial 1. The point in the orbit of a planet or comet at which it is nearest to the sun. 2. The point nearest the sun in the orbit of a planet or other celestial body. Related 'around, round, surrounding' units: ambi-; ampho-; circ-; circu...
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http://www.wordinfo.info/words/index/info/view_unit/1610/8
The point in the path of a planet, asteroid, comet, or other body that is closest to the sun.
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https://pds.jpl.nasa.gov/planets/special/glossary.htm
The point of closest approach for any object orbiting the Sun (Helios is Greek for Sun). See also: Aphelion, Perigee, Perihelic Opposition, Sun.
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https://www.encyclo.co.uk/local/20687
noun periapsis in solar orbit; the point in the orbit of a planet or comet where it is nearest to the sun
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https://www.encyclo.co.uk/local/20974
In astronomy, the point at which an object, travelling in an elliptical orbit around the Sun, is at its closest to the Sun. The point at which it is furthest from the Sun is the aphelion
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https://www.encyclo.co.uk/local/21221
When an object which revolves around the Sun is at the closest point it gets to the Sun.
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https://www.encyclo.co.uk/local/22784
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