The idea of the multiverse — or the theoretical possibility of infinite parallel universes–straddles a strange world between science fiction and a plausible hypothesis.
In this episode we dive deeper into the relationship between space and time and explore how we can geometrically map the causality of the universe and increase our understanding of how time and distance relate to one another.
Astronomy Cast takes a fact-based journey through the cosmos as it offers listeners weekly discussions on astronomical topics ranging from planets to cosmology. Hosted by Fraser Cain (Universe Today) and Dr. Pamela L. Gay (CosmoQuest), this show brings the questions of an avid astronomy lover direct to an astronomer. Together Fraser and Pamela explore what is known and being discovered about the universe around us.
- Ep. 555: Satellite Constellations: Views from AAS
- Ep. 554: Physics and Astronomy Culture of Hawai’i
- Ep. 553: What To Look Forward To In 2020
- Ep. 552: Boyajian’s star (and other strange stars)
- Ep. 551: Missing Epochs – Observing before the CRB
- Ep. 550: Missing Epochs – Observing the Cosmic Dark Ages
- Ep. 549: Stellar nucleosynthesis revisited: In and on and around dead stars
- Ep. 548: Stellar nucleosynthesis revisited: In stellar cores & atmospheres
- Ep. 547: Why Astronomy Still Needs Humans
- Ep. 546: Weird Issues: Planetary Migration
- Ep. 545: Weird Issues: Are comets asteroids or are asteroids comets?
- Ep. 544: Weird Issues: Biosignatures and the Viking Experiments
- Ep. 543: Weird Issues: The Habitable Zone
- Ep. 542: Weird Issues: The Age of the Universe
- Ep. 541: Weird Issues: The Age of the Universe
We’ve established by now that black holes are weird. The result of absolute gravitational collapse of a massive body: a point of hypothetical infinite density surrounded by an event horizon. At that horizon time is frozen and the fabric of space itself cascades inwards at the speed of light. Nothing can travel faster than light, and so nothing can escape from below the event horizon- not matter, not light, not even information.
Astronomy is designed to meet the scope and sequence requirements of one- or two-semester introductory astronomy courses. The book begins with relevant scientific fundamentals and progresses through an exploration of the solar system, stars, galaxies, and cosmology. The Astronomy textbook builds student understanding through the use of relevant analogies, clear and non-technical explanations, and rich illustrations. Mathematics is included in a flexible manner to meet the needs of individual instructors.
Our modern society depends on science. It impacts the way we eat, work, communicate and play. And yet, most people take our amazing scientific advancement for granted, and some are even hostile to it. What can we do to spread the love of science through education, outreach and media?
For those non-scientists trying to get their original ideas accepted by the scientific community, you’ve got to have thick skin. It might seem like there’s a vast conspiracy, or a general attitude that drives away original, but unorthodox ideas. But that’s not true, the reality is that great ideas in science come from everywhere, even amateurs.
Astronomy is one of the few sciences where amateurs make meaningful contributions to discoveries. Many professional researchers work hand-in-hand with teams of amateurs to make discoveries that just wouldn’t be possible without this kind of collaboration. In fact, Pamela regularly relies on dedicated enthusiasts for her data on variable stars.