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solar flares.
A small galaxy with stars and very little dust is commonly called an elliptical galaxy. Elliptical galaxies are extremely small and typically made up of smaller and older stars.
Hydrogen
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Mercury: None
Venus: None
Earth: Moon
Mars: Phobos
Jupiter: Ganymede
Saturn: Titan
Uranus: Titania
Neptune: Triton
*Pluto: Charon
*Pluto is not a planet but in case your are curious...
absolute magnitude
skin
You call a plane with two set of wings a Biplane.A plane with one set of wings is called a monoplane.A plane with three set of wings is called a triplane.
Degenerate stars
Continents.
Neil Armstrong never served on a space shuttle mission. He was part of the Apollo Program
In many places including the United States, winter is defined as the period from the winter solstice to the vernal equinox, spring is defined as the period from the vernal equinox to the summer solstice, summer is defined as the period from the summer solstice to the autumnal equinox, and fall or autumn is defined as the period from the autumnal equinox to the winter solstice. In the northern hemisphere, the winter solstice is the December solstice, the vernal equinox is the March equinox, the summer solstice is the June solstice, and the autumnal equinox is the September equinox. In the southern hemisphere, the winter solstice is the June solstice, the vernal equinox is the September equinox, the summer solstice is the December solstice, and the autumnal equinox is the March equinox. The dates of the March equinox range from the 19th to the 22nd of March, the dates of the June solstice range from the 19th to the 23rd of June, the dates of the September equinox range from the 21st to the 24th of September, and the dates of the December solstice range from the 20th to the 23rd of December. Examples of the earliest season start times are in 2096, and examples of the latest season start times are in 1903.
winter solstice
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