Just How Fast is the Universe Expanding EXACTLY? ...and how do we know this?
Deep Astronomy1 Apr 2019

Just How Fast is the Universe Expanding EXACTLY? ...and how do we know this?

We've known since Edwin Hubble's time that the universe has been expanding. What we've only recently learned (like, in the past 10 years or so) is that the universe is accelerating as it expands. Measuring this expansion rate has been problematic and while there are at least two different ways to make the measurement, they don't always agree.

This episode features Ed Macauley from the University of Portsmouth UK, and a member of the Dark Energy Survey collaboration. He and his team have been using a calibrated version of the 'standard candle' method of determining the rate of universal expansion, also known as the Hubble Constant or H0 to get a better answer that agrees with other measurement techniques.

You can read Ed's paper on Arxiv.org here: https://arxiv.org/pdf/1811.02376.pdf

Denne episoden er hentet fra en åpen RSS-feed og er ikke publisert av Podme. Den kan derfor inneholde annonser.

Episoder(37)

Countdown to JWST #1: Finally Ready to Launch?

Countdown to JWST #1: Finally Ready to Launch?

Here's the first installment of Countdown to JWST, a podcast that will track the mission up to launch (hopefully) later this year. Let's light this candle!

15 Feb 202121min

Was There A First Cause?

Was There A First Cause?

Was there a first cause? Can there be a event that started everything? What would such an event look like? In this episode Tony and Charlotte discuss the scientific and philosophical understanding ...

5 Nov 201954min

When An Atheist Met A Catholic Theologian

When An Atheist Met A Catholic Theologian

This episode kicks off what I hope will be a weekly posting for the DA Show. My wife Charlotte is a Catholic theologian and philosopher who has taught me much outside of my scientific realm. I have ...

29 Okt 201938min

A Cautionary Science Tale: BICEP2 and the Perils of the Nobel Prize

A Cautionary Science Tale: BICEP2 and the Perils of the Nobel Prize

Remember all the commotion about the BICEP2 mission back in 2014? Cosmologist had announced the observation of polarized "B-mode" waves that, if connected to the universal cosmic microwave background...

11 Okt 201956min

Using Nuclear Power for Deep Space Exploration

Using Nuclear Power for Deep Space Exploration

It turns out that NASA and others have been thinking about the inefficiencies of using chemical rockets to go to the Moon, Mars and the Outer Planets. One very attractive solution is Nuclear Thermal ...

3 Okt 20191h 2min

The Apophis Asteroid: Should You Be Worried?

The Apophis Asteroid: Should You Be Worried?

Let's talk about the potentially hazardous asteroid known as Apophis. In April, 2029 this 320 meter rock will get so close that it will pass under the orbit of geosynchronous satellites! Astronomers...

3 Jun 201942min

Was the Event Horizon Telescope Black Hole Image a Waste of Time?

Was the Event Horizon Telescope Black Hole Image a Waste of Time?

In this podcast: an essay on whether the effort that went into making the black hole image in the distant galaxy M87 by the Event Horizon Telescope was worth it; an interview with star mapper Wil Tiri...

20 Mai 201936min

The Large Millimeter Telescope

The Large Millimeter Telescope

This podcast features science and technology from the Large Millimeter Telescope. Our guests Nat DeNigris and David Sanchez will be on hand to discuss this amazing facility being operated in Mexico. ...

17 Mai 20191h

Populært innen Vitenskap

fastlegen
tingenes-tilstand
jss
sinnsyn
dekodet-2
rekommandert
forskningno
villmarksliv
liberal-halvtime
rss-paradigmepodden
rss-nysgjerrige-norge
rss-zahid-ali-hjelper-deg
rss-inn-til-kjernen-med-sunniva-rose
tidlose-historier
kvinnehelsepodden
rss-rekommandert
nordnorsk-historie
fjellsportpodden
tomprat-med-gunnar-tjomlid
rss-lundqvist-podden