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cosmic snowballs of frozen gases, rock and dust that orbit the Sun
What is a comet?
the natural satellite of a planet
What is a moon?
a small rocky body orbiting the sun
What is an asteroid?
a moon, planet or machine that orbits a planet or star
What is a satellite?
a rock that has entered Earth’s orbit
What is a meteor?
the orbit of each planet
What is an ellipse?
Sputnik was the first kind of these tools that sit outside of our atmosphere.
What is a satellite?
an enormous cloud of dust and gas occupying the space between stars and acting as a nursery for new stars
What is a nebula?
When a star starts running out of fuel, the size of the star
What is expands?
Where Earth's water came from
What are asteroids?
the movement of a planet around the Sun, a “year”
What is a revolution?
a gravitationally bound system of stars, stellar remnants, interstellar gas, dust, and dark matter
What is a galaxy?
a celestial body that orbits the sun but has not cleared the neighborhood around its orbit and is not a moon.
What is a dwarf planet?
a celestial body moving in an elliptical orbit around a star
What is a Planet?
the movement or spin of the Earth or an other body turning on its axis
What is a rotation?
a luminous ball of gas, mostly hydrogen and helium, held together by its own gravity
What is a star?
the range of wavelengths or frequencies over which electromagnetic radiation extends
What is Electromagnetic Spectrum?
the date (twice each year) at which the sun crosses the celestial equator, when day and night are of approximately equal length
What is an equinox?
The sun appears to set due to...
What is Earth's rotation?
an eclipse in which the sun is blocked by the moon
What is a solar eclipse?
When the Earth passes perfectly between the Sun and Moon
What is a lunar eclipse?
The process of questioning, hypothesizing, experimenting with, analyzing, and drawing conclusions on observations made in the natural world.
What is the scientific method?
The three brightest objects in our night sky
What are the Sun, Moon, and Venus
When a super-massive star dies it either leaves behind a black hole or...
What is a neutron star?
the distance that light travels in one year, which is 9.4607 × 1012 km (nearly 6 trillion miles)
What is a light-year?