What is meant by the expansion of the universe?
When scientists talk about the expanding universe, they mean that it has been growing ever since its beginning with the Big Bang. In other words, the universe has no center; everything is moving away from everything else.
What causes expansion of the universe?
The energy from the Big Bang drove the universe’s early expansion. Since then, gravity and dark energy have engaged in a cosmic tug of war. Gravity pulls galaxies closer together; dark energy pushes them apart. Whether the universe is expanding or contracting depends on which force dominates, gravity or dark energy.
What does the expansion of the universe mean quizlet?
The expansion of the universe means that galaxies are spread apart by the expansion of space between them, rather than galaxies speeding through space to spread apart like an explosion. The expansion of the universe is a property of space itself: the more space between things, the more expansion they will experience.
Do we expand with the universe?
In June 2016, NASA and ESA scientists reported that the universe was found to be expanding 5% to 9% faster than thought earlier, based on studies using the Hubble Space Telescope.
What is causing the expansion of the universe quizlet?
Scientists theorize that dark energy is causing the expansion of the universe to accelerate.
What is actually expanding when we say the universe is expanding quizlet?
Terms in this set (6) Which of the following statements best describes what astronomers mean when they say that the universe is expanding? The average distance between galaxies is increasing with time.
Which statement accurately describes the origin expansion of the universe?
Which statement accurately describes the origin and expansion of the universe? As the universe continues to expand, it gradually gets warmer. Galaxies that are farther away are moving away more slowly. Cosmic background radiation is leftover thermal energy from the big bang.
Why do astronomers think that the universe is expanding quizlet?
Why do astronomers believe the Universe is expanding? They see a redshift in the spectral lines of distant galaxies. The distance beyond which astronomical objects are invisible — even in principle — because the Universe is not old enough for their light to have had time to reach us. You just studied 15 terms!
Which of the following statements best describes the expansion of the universe?
Q. Which of the following best describes the expansion of the universe? As space expands, matter spreads out to fill up the empty space.
What key observations lead us to conclude that the universe is expanding?
Edwin Hubble saw that 1) every galaxy outside of the local group is moving from us and the 2) farther away the other galaxy is the faster it appears to be moving.
What is currently causing the universe to expand at an accelerated rate quizlet?
Dark matter does not emit electromagnetic radiation. 3. Scientists theorize that dark energy is causing the expansion of the universe to accelerate.
What would most likely cause the future acceleration of the expansion of the universe?
In 1998, Scientists discovered that the expansion of the universe has been accelerating. What would most likely cause the future acceleration of the expansion of the universe? The continued existence of dark energy. Which is currently the most supported theory about the future of the universe?
What exactly does the expansion of the universe mean?
The expansion of the universe is the increase in distance between any two given gravitationally unbound parts of the observable universe with time. It is an intrinsic expansion whereby the scale of space itself changes.
Will the expansion of the universe happen forever?
The expansion rate drops but never reaches zero; the Universe expands forever and ends in a Big Freeze.
Is the expansion of the universe really accelerating?
Observations show that the expansion of the universe is accelerating , such that the velocity at which a distant galaxy recedes from the observer is continuously increasing with time.
Why is the expansion of the universe accelerating?
The accelerating expansion of the universe is the observation that the universe appears to be expanding at an increasing rate, so that the velocity at which a distant galaxy is receding from the observer is continuously increasing with time.