1998年5月8日 · Balloon Analogy in Cosmology The expanding balloon analogy for cosmological models is shown below at two different times. A common misconception is that the balloon is expanding into empty space that is "beyond the Universe" and that it is expanding from a single point in the center of the balloon.

2023年10月11日 · Columnist and Space How the balloon analogy for an expanding universe is almost perfect If space-time is expanding, then why does gravity seem to pull things together?

1998年2月16日 · The balloon analogy is often used, but it breaks down when people ask: "What about inside the balloon?" After all, we are observing the balloon in three dimensions.

2015年9月16日 · What is the Balloon Analogy used to explain in cosmology? How does the Balloon Analogy represent the expanding universe? Does the Balloon Analogy accurately depict the size and shape of the universe? What are some common misconceptions associated with the Balloon Analogy? How does the expansion of the universe affect us locally?

2023年10月14日 · What we are interested in is how the distance between the dots on the surface of the balloon grows as we put more air into it. Here, the dots aren't racing away from each other. The balloon is expanding between them, increasing the distance that separates them. This is a pretty good analogy that relies somewhat on our geometric sensibilities.

Quasar Variability Study Grade Level: 6-8 Lesson Time: 45 minutes National Science Standards: A-2: Understanding Scientific Inquiry; D-3: Earth & Space; G-3: History & Science The Expanding Universe – Balloon Analogy Introduction of thinking about the …

A good way to help visualise the expanding universe is to compare space with the surface of an expanding balloon. This analogy was used by Arthur Eddington as early as 1933 in his book The Expanding Universe. It was also used by Fred Hoyle in the 1960 edition of his popular book The Nature of the Universe.

2004年12月2日 · Since this analogy uses a spherical spatial section, it corresponds to a closed Universe which recollapses. The balloon will expand to just touch the edges of the box, and then shrink toward the Big Crunch. At the Big Crunch, the JAVA applet will restart with a …

Even though this animation shows a spherical Universe, the scale factor a (t) follows the law for a critical density Universe which expands forever. Eventually you will have totally blue box with no galaxies in it. A mouse click will restart the model with a new set of galaxies. Note that the galaxies do not expand.

2023年10月14日 · If space-time is expanding, then why does gravity seem to pull things together? Physics can be weird, says Chanda Prescod-Weinstein. Copyright © 2023 Published by New …