Examlex
The value of the accepted Hubble constant is about 73 km s-1 Mpc-1.
Motion Parallax
A depth cue that involves the relative movement of objects as the observer moves, allowing for the perception of three-dimensional depth.
Target
A predetermined goal or objective towards which efforts are directed.
Gaze
The act of looking steadily and intently, especially in admiration, surprise, or thought.
Frame for Reference
A set of criteria or stated values in relation to which measurements or judgments can be made.
Q14: Gravitational lensing involves using a special type
Q28: The primary purpose of describing planetary orbits
Q54: When we look out into the universe,far
Q55: The chemical constituent that absorbs UV radiation
Q82: When astronomers look for evidence of hydrogen
Q90: Exosolar planets are thought to be planets
Q95: Newton's second law of motion states that
Q100: The idea that the Sun and planets
Q111: The cosmic microwave background radiation is not
Q123: The possible presence of a supermassive black