Is the Hubble constant not…Constant?

The Hubble constant, explained - UChicago News

Because light from a distant object has traveled for billions of years to reach us, our observations are not only affected by the present-day value of the ...

Is the Hubble Constant actually constant? : r/astrophysics - Reddit

The Hubble Constant is just the speed at which the universe is expanding right now. It was expanding at different rates in the past, and will be expanding at ...

Not a constant: The Hubble "constant" changes over time - Big Think

If the energy density changes, that means the expansion rate changes, too. The Hubble constant is only a constant everywhere in space, as we ...

Is the Hubble constant actually constant? - Physics Stack Exchange

More generally, it is called the Hubble parameter because it is not constant, rather it is a function of cosmological redshift, H(z).

Sorry, Astronomy Fans, The Hubble Constant Isn't A Constant At All

It has a value today that's the same everywhere in the Universe, making it a constant in space, but it's not a constant in time. In fact, so ...

Why is the value of Hubble's constant changing over the decades?

If there is deceleration or acceleration in the universe, then the Hubble parameter is not constant. Until the last 5 billion years or so ...

Hubble's law - Wikipedia

The Hubble constant can also be stated as a relative rate of expansion. In this form H0 = 7%/Gyr, meaning that at the current rate of expansion it takes one ...

Why is the Hubble time same with age of the universe assuming ...

Suppose that the Hubble constant is 1 m/s/m, that's not changed along the time. Then, the object far from 10 m is receded by 10 m/s. Because, ...

What Is The Hubble Constant? - Space.com

The universe, in fact, is getting faster in its acceleration as it gets bigger. What's interesting about the expansion is not only the rate, but ...

Surprise! The Hubble Constant Changes Over Time - Forbes

The reason we call it the Hubble constant is because the Universe expands at the same rate at every location in the Universe: the Hubble ...

Is the Hubble constant not…Constant? - Universe Today

They then used each bin to measure the Hubble constant. In the standard cosmological picture, the expansion rate of the universe is constantly ...

Question about the Hubble Constant - Physics Forums

It indeed will always be smaller in the future, but not arbitrarily smaller. It was arbitrarily higher in the past, especially in the first ...

Hubble's Contentious Constant - NASA Science

Thanks to astronomer Edwin Hubble and others, scientists have known since 1929 that our universe is expanding. · Not anymore, and that's a big ...

An Inconstant Hubble Constant? New Research Suggests Fix to ...

Early in the universe's existence, light moved through plasma — there were no stars yet — and from oscillations similar to sound waves created ...

Why is the Hubble Constant NOT Constant? - YouTube

The most important number in all of cosmology --the Hubble constant -- which describes the current rate of cosmic expansion, is causing ...

WMAP- Expansion of the Universe - NASA

The current rate of expansion is usually expressed as the Hubble Constant (in units of kilometers per second per Megaparsec, or just per second).

Is the Hubble constant a constant or is it a parameter?

The nomenclature of the "Hubble constant" comes from the original observations of recession velocity being proportional to distance and the ...

Cosmology: the 'Hubble constant' is not actually ... - La Sapienza

Cosmology: the 'Hubble constant' is not actually constant ... According to scientists, the Hubble constant, a fundamental cosmological parameter ...

The Hubble Constant - PMC - PubMed Central

Many, but not all, object-based measurements give H0 values of around 72–74 km s−1 Mpc−1, with typical errors of 2–3 km s−1 Mpc−1. This is in mild discrepancy ...

What Is the Hubble Constant? | Live Science

The Hubble constant is a unit that describes how fast the universe is expanding at different distances from a particular point in space.