Examlex
The Helix and Egg nebulae which originated from (what are today) white dwarf stars are
Conservative
A political and social philosophy promoting traditional institutions, values, and practices, and often expressing skepticism towards rapid changes and innovations.
Third World
An outdated term originally used to describe countries that were neither aligned with NATO (the First World) nor the Communist Bloc (the Second World), often used now to refer to developing countries.
Suez Canal
A man-made waterway connecting the Mediterranean Sea to the Red Sea, allowing for direct maritime transport between Europe and Asia without navigating around Africa.
Eisenhower Administration
The period of American history from 1953 to 1961, when Dwight D. Eisenhower served as the President of the United States, marked by a focus on moderate policies and the Cold War's early years.
Q18: What evidence do we have that the
Q22: The relative abundance of chemical elements are
Q24: The multicolored ring in the image above
Q25: If a galaxy is located at a
Q26: The resolution of Olbers's paradox suggests that
Q56: What observation has prompted astronomers to ponder
Q82: The Local Group of galaxies is dominated
Q95: From the data given, which star in
Q101: In the double-exhaust model, the radio lobes
Q148: Why should we expect quasars to be