What are the Magellanic Clouds?
A) two small galaxies that probably orbit the Milky Way Galaxy
B) two nebulae located in the disk of the Milky Way Galaxy and visible only from the Southern Hemisphere
C) star-forming clouds found in the constellation Orion
D) the clouds of dust and gas found interspersed in many places throughout the Milky Way Galaxy
A
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The second postulate of special relativity states that ____
a. observers cannot detect their uniform motion except relative to other objects b. observers cannot distinguish locally between inertial forces and uniform gravitational forces due to acceleration and the presence of a massive body c. the laws of physics are the same for all observers regardless of their motion as long as their speed is constant d. the speed of light is constant and will be the same for all observers independent of their motion relative to the light source e. the acceleration of an object is proportional to the applied force and inversely proportional to its mass
The background stars during a solar eclipse are those of constellations
A) of the opposite season. B) seen in the nighttime sky. C) not seen normally. D) seen in the opposite hemisphere.
The Oort cloud is filled with stony-iron meteorites
Indicate whether the statement is true or false
The Sun remains stable because the inward pull of ______________ balances the outward push from nuclear fusion
Fill in the blank(s) with correct word