WebThe Hubble time is the right age for the universe only if the expansion rate has been constant throughout the time since the expansion of the universe began. Continuing with our end-of-the-semester-party analogy, this is equivalent to assuming that you traveled home from the party at a constant rate, when in fact this may not have been the case. WebNov 6, 2008 · Two students are having a discussion after studying the Hubble Law. Student 1: According to the Hubble Law space is expanding. Therefore our galaxy is bigger today than it was in the past and will keep getting bigger. Student 2: No. Our galaxy is a gravitationally bound system.
What Is the Hubble Space Telescope? NASA
WebOct 7, 2024 · Hubble’s law, which says simply that a galaxy’s velocity (or as is sometimes … WebTo be able to compute a meaningful distance from the Hubble law, we must deal with galaxies for which the expansion velocity is much greater than these random velocities: at least 5000 km/s. What is the distance corre- sponding to this speed of 5000 km/s? The Hubble Law tells us that v = H0d. iphone best buy trade in deals
Hubble’s Law: Explanation, Equation & Examples, Graph
WebMar 17, 2015 · Using Hubble’s Law enables the crucial determination of Hubble distances to galaxies and quasars (Hubble distances are those derived from Hubble’s Law using the observed velocity of the object; these distances represent the true cosmic distance plus a small peculiar motion component). WebThe Hubble constant indicates the rate at which the Universe is currently expanding, so although it is called a ‘constant’ it changes with time. The Hubble constant is give by: H 0 = v/d. Where v is the radial velocity, d is the distance and the 0 denotes that the number derived is the Hubble constant at the present time. WebThe Hubble constant is one of the most important numbers in cosmology because it tells us how fast the universe is expanding, which can be used to determine the age of the universe and its history. It gets its name from UChicago alum Edwin Hubble, who was first to calculate the constant from his measurements of stars in 1929. iphone belt case