the unit, equivalent to the mass of the sun, in which the masses of stars and other celestial objects are given: a black hole of one million solar masses.
Why Do We Have Leap Year?Even though the standard calendar year is 365 days, the Earth actually takes 365 days 5 hours 48 minutes and 46 seconds to go completely around the sun. (This is called a solar year.) In order to keep the calendar cycle synchronized with the seasons, one extra day is (usually) added every four years as February 29th. The Julian calendar (established by Julius Caesar in …
9 Common Grammatical PitfallsRead more in this article about some frequently asked questions and fun facts related to our definitions.
- solar flare,
- solar furnace,
- solar ganglion,
- solar heating,
- solar house,
- solar month,
- solar myth,
- solar neutrino unit,
- solar panel,
- solar photovoltaic cells
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
an astronomical unit of mass equal to the sun's mass, 1.981 × 10 30 kilogramsSymbol: M ⊙
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012