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| is termed universal because it is a property of all material objects. |
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| of a star is the apparent magnitude it would have if it were 10 pc from earth. |
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is caused by rising currents of hot gas below the photosphere. and causes the grainy appearance of the photosphere |
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| are elementary particles that travel close to the speed of light and pass through solid matter almost undisturbed, resulting from certain types of radioactive decay from the sun and other stars. |
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| The sunspot cycle affects |
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| 1, the latitude at which sunspots are visible at a given time, 2, the # of sunspots tha are visible at a given time, and 3, the magnetic polarity of the sunspots at a given time. |
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| According to the theory of general relativity, GRAVITY is caused by |
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| the curvature of space-time. |
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| is the total energy radiated by the star in one second. |
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| the most common stars are |
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| lower main sequence stars |
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| sunspots are dark because |
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| the strong magnetic field inhibits the currents of hot gas rising from below. |
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| is responsible for the suns surface and atmospheric activity |
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| is the apparent shift of an object against the background that is caused by a change in the observer's position. |
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| How a stars magnitude looks from human eyes on earth (mv) |
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| is the average random speed of particles in the gas |
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| cannot pass thru earths atmosphere |
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| a constant for all types of electromagnetic waves ina vaccum |
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| a telescopes primary purpose |
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| to collect a large amount of light and bring it into focus |
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| THe doppler effect can help determine |
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| 1, the speed at which a star is moving away from an observer, 2, the radial velocity of a star, and 3, the speed at which an object is traveling toward an observer |
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| is the change in frequency and wavelength of a wave for an observer moving relative to the source of the waves. |
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| the xray has the highest energy of photons |
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| Hubble Space Telescope (HST) |
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| diferent from other telescopes because it has better resolution and can see light at more wavelengths |
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