Astronomy and space science interactive science chapter 3 vocab

Flashcard maker : Kate Moore
Geocentric
an earth centered model of the solar system
Heliocentric
a sun centered model of the solar system
ellipse
oval shape
Solar system
The system consisting of the sun and the plants and other objects that revolve around it
Astronomical unit
a unit of distance equal to the average distance between Earth and the sun, about 150,000,000 km
Planet
An object that orbits a star, Is large enough to have become round by its own gravity, and has cleared an area of its orbit
Dwarf planet
An object that orbits the sun and is spherical, but has not cleared an area of its orbit
Planetesimal
One of the small Astroid-like bodies that formed the building blocks of the planets
Core
The central region of the sun when nuclear fusion occurs
Nuclear fusion
The process in which to atomic nuclei combine to form a larger nucleus forming a heavier element and releasing huge amounts of energy; the process by which energy is produced in stars
Radiation zone
a region of very Tightly packed gas in the suns interior where Energy is transferred mainly in the form of electromagnetic radiation
Convection zone
The outermost layer of the suns interior
Photosphere
The interlayer of the sun’s atmosphere that Gives off it’s visible light; the sun’s surface
Chromosphere
The middle layer of the sun’s atmosphere
Corona
The Allerler the sun’s atmosphere
Solar wind
A stream of electrically charged particles that emanate from the suns corona
Sunspot
a large area of gas on the sun’s surface that is cooler than the surrounding gases
Prominence
a huge reddish loop of gas That protrudes from the sun’s surface Linking parts of sunspot regions
Solar flare
In eruption of gas from the sun’s surface that occurs when the loops in sunspot regions suddenly connect
Terrestrial planet
The name often given for the four inner planets: Mercury Venus Earth and Mars
Greenhouse effect
The Tracking of heat near a planet surface Caused by certain gases in the planet’s atmosphere
Gas giant
The name often given to the outer planets: Jupiter Saturn Uranus and Neptune
Ring
a Small disc of small ice and rock particles surrounding the planet
Astroid belt
The region of the solar system between the orbits of Mars and Jupiter, where many astroids are found
Kuiper belt
a region when many small objects orbit the sun that stretches beyond the orbit of Neptune to about 100 times earths distance from the sun
Oort cloud
A spherical region of commets that surround the solar system
Comet
a loose collection of ice and dust that orbits the sun typically a long Narrow orbit
Coma
The fuzzy outer layer of a comet
Nucleus
The solid inner core of a comet
Astroid
one of the rocky objects Revolving around the sun that are too small and numerous to be considered planets
Meteoriod
a chunk of rock or dust in space generally smaller than astroid
Meteor
Streak of light in the sky produced by the burning of the meteoroid earths atmosphere
Meteorite
A Meteriod that passes through the atmosphere and hits earth’s surface

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