Physics

The Kepler spacecraft has identified more than eight hundred confirmed exoplanets. Indicate ...

Started by Destiiny22

The haphazard terrain of Miranda suggests it was broken up by impact after it had differentiated, ...

Started by luminitza

Why isn't the space within our solar system or the Milky Way expanding according to Hubble's Law? ...

Started by ahriuashd

The fact that we don't see very many Earthlike planets in orbit around other stars is an indication ...

Started by yoooooman

When an electron drops to a lower energy level in an atom, A) the electron becomes more massive. ...

Started by vicky

If the sun's surface cooled, how would its appearance change? A) It would appear more blue. B) It ...

Started by faduma

Has Polaris always been the North Star? A) No, because the Earth's axis slowly changes the ...

Started by kaid0807

In order for an atom to absorb a photon (a particle of light), A) the photon must have energy ...

Started by Starlight

If all the dark matter in our universe were to be instantaneously removed, which of the following ...

Started by Jramos095

If you see Polaris directly overhead at midnight, you must be at A) the South Pole. B) the North ...

Started by Alainaaa8

About 90 of the star's total life is spent on the main sequence. Indicate whether the statement ...

Started by londonang

Saturn's rings appear to be brighter and younger than the dirty, dark rings around Uranus and ...

Started by RYAN BANYAN

Although the Sun does not generate energy by gravitational contraction today, this energy-generation ...

Started by cagreen833

Which of the following describes the light that can be detected from a person? A) The person ...

Started by jparksx

Helium fusion requires a higher temperature than hydrogen fusion. Indicate whether the statement ...

Started by melina_rosy

Degeneracy pressure stops the crush of gravity in all the following except A) a very massive ...

Started by CORALGRILL2014

While more massive than most of its neighbors, our Sun is still technically a low-mass star. ...

Started by vicky

Olympus Mons is ________. A) a huge volcano on Venus B) a huge volcano on Mars C) a great canyon ...

Started by cookcarl

Which model of the universe gives the youngest age for its present size and expansion rate? A) a ...

Started by sarasara

What will occur when the full moon is on the ecliptic? A) a total lunar eclipse B) a total solar ...

Started by robinn137

In South Africa, it's usually quite warm around the time of the December solstice and quite cool ...

Started by Redwolflake15

The main reason that stars evolved off the main sequence is because they are becoming less massive ...

Started by lilldybug07

If you are in the Moon's umbral shadow, then you are witnessing A) nighttime. B) some kind of ...

Started by Medesa

A teaspoonful of white dwarf material on Earth would weigh A) a few pounds. B) about the same as ...

Started by cherise1989

The time for the Moon to orbit Earth, relative to the stars is A) 23 hours, 56 minutes. B) about ...

Started by vinney12