It can be inferred from the sentence
highlighted in the passage that a standard candle is useful to scientists for which of the following reasons?
A) Standard candles do not have their own locus of motion.
B) Standard candles more reliably adhere to the law of inverse squares than do other supernovas.
C) Only standard candles provide a known measure of brightness.
D) Knowledge of an object’s brightness allows scientists to measure the speed at which the object is moving toward Earth.
E) Knowledge of an object’s brightness allows scientists to accurately measure its distance from Earth.
Consider each of the choices separately and select all that apply.
According to the passage, if two astronomical objects of differing distances from Earth were observed, which of the following would be true of the object closer to Earth?
❑ It would not be as bright as the object farther from Earth.
❑ It would be younger than the object farther from Earth.
❑ It would be traveling away from the Earth more slowly than the farther object.
It can be inferred from the passage that a standard candle may not provide an accurate measure of distance if
A) the galaxy being measured is moving too quickly
B) interstellar dust makes the object measured appear dimmer than it really is
C) if the galaxy being measured has a local component of the measurement
D) the particles being measured do not completely accord with a linear motion
E) the galaxies being measured move at different speeds
According to the passage, if two supernovas are observed and one of those supernovas is brighter than the other, scientists can conclude that
A) the brighter supernova is moving closer to our galaxy at a higher speed
B) the precise location of the supernova is measurable
C) the brighter supernova may be closer to our own galaxy
D) the brighter supernova is farther away from Earth by a distance that is roughly inversely proportional to the dim supernova
E) the distance between the supernovas and our own galaxy is inversely proportional