is the science that studies the composition, position, and movements of all objects in space.
three constellations that always appear in our night sky: Dig Dipper, Little Dipper and Casseopia.
the part of the sun that is visible during a complete solar ecllopse. The outer atmosphere of the sun.
weak tides, when the sun and moon are perpendicular to each other with respect to the sun.
one of the four planets furthest from the sun, the gas giants, Jupiter, Saturn, Uranus and Neptune
most of the planet is made up of gasses. Another name for the outer planets: Jupiter, Saturn, Uranus and Neptune.
The planets closest to the sun; Mercury, Venus, Earth, and Mars. They are also known as the terrestrial planets.
one of the dense rocky planets nearest to the sun: Mercury, Venus, Earth, and Mars.
any of numerous small celestial bodies composed of rock and metal that move around the sun (mainly between the orbits of Mars and Jupiter)and are too small to be called planets
A STREAK OF LIGHT in the sky produced by the burning of a meteoroid in Earth's atmosphere, a falling star. It doesn't hit the ground.
Big splash theory
The current theory that explains the formation of the moon; it states that, approximately 4.5 billion years ago, the moon was formed as a result of an object colliding with earth, causing less dense portions to be blasted into space.
rotating nebula theory
Theory of the formation of solar system. It started as a nebula which collapses and then then sun forms. The remaining particles rotate around the sun and clump forming protoplanets and then terrestrial planets. When the sun powered up it blasted the gases out further which ended up forming the gas giants.
He discovered the existence of other galaxies and determined that galaxies are moving away from us
a shift of the spectral lines to longer wavelengths. The greater the shift, the faster the galaxy is moving away from us
a range of wavelengths, evident by bands of light, seen through a spectroscope. Each chemical element has its own spectrum. (color bands)
big bang theory
the theory that all matter and energy in the universe was compressed into an extremely small volume that 13 billion to 15 billion years ago exploded and began expanding in all directions
an apparent shift in the position of a star against the background of more distant non-moving stars.
a method of determining the distance to a point using two angles and a baseline of known distance.
the measurement between two fixed points, used in triangulation. Used to measure the distance of stars. The longest baseline used is the diameter of the earth's orbit.
hydrogen nuclei fuse to form helium nuclei.The reaction releases an enormous amount of energy
cepheid variable stars
are unstable big stars that are 1000x brighter than the sun and the pulse, they have predictable brightness and behavior, brighter=closer, dimmer=further, they are found in most galaxies and are used to determine distance
dark spots on the Sun's surface, varying in size and regularity, caused by disturbances in the Sun's magnetic field. These are the origin of solar flares/prominences.
huge, arching line of gas, released from the photosphere. They last several weeks.
brief expulsion of large quantities of gas and charged particles originating from sunspots.
an ionized gas emitted from the Sun from solar flares and prominences. This gas enters our atmosphere and causes the northern lights.
a galaxy shaped like a pinwheel. Our Milky Way galaxy is an example of this type of galaxy.
Barred spiral galaxy
A galaxy that is similar to a spiral galaxy, except that the spiral arm pattern originates from a bar of material that passes through the nucleus of the galaxy.
a star cluster that has a loose, disorganized appearance and contains no more than a few hundred, typically young, stars.
optical telescope consisting of a large concave mirror that produces an image that is magnified by the eyepiece -Isaac Newton
a form of energy that exhibits wavelike behavior as it travels through space
optical telescope that has a large convex lens that produces an image that is viewed through the eyepiece-Galileo
a spacecraft that has various scientific instruments that can collect data, including visual images, but has no human crew
the end stage of a high mass star life cycle . It is a star that emits light and a beam of very high energy radio waves
Remnant of a very high mass star that is so dense that nothing, not even light, can escape its gravity field.