Toggle light / dark theme

Primordial black holes are tiny versions of the big beasts you typically think of. They’re so small, they could easily fit inside stuff, like a planet, or a star… or a person. So, needless to say, this has piqued the curiosity of our Dead Planeteers.

Leah and Chelsea want to know, can you put primordial black holes inside things and what happens if you do?

Black hole astronomer Allison Kirkpatrick at the University of Kansas is back to help them figure this one out. And it turns out, despite being very small, these black holes are incredibly heavy, so ingesting and/or hugging them seems firmly off the cards — much to Chelsea’s displeasure.

Dead Planets Society is a podcast that takes outlandish ideas about how to tinker with the cosmos – from punching a hole in a planet to unifying the asteroid belt – and subjects them to the laws of physics to see how they fare.

Your hosts are Leah Crane and Chelsea Whyte.

If you have a cosmic object you’d like to figure out how to destroy, email the team at [email protected]. It may just feature in a later episode.

The Halo Drive, using a laser to gain fuel free relativistic propulsion from a black hole. By shooting a laser close to the event horizon of a black hole, Dr. David Kipping’s conceptual star drive could lead to traveling across the milky way from one black hole to another as well as techno signatures from advanced civilizations that might already be using this intergalactic relay system.

The halo drive: • the halo drive.

Cool Worlds — YouTube: / @coolworldslab.

Cool Worlds:
http://coolworlds.astro.columbia.edu/

Kipping, David (2018), \

A lot of additional research will need to be done on this subject, but it is always good to see new ideas being presented, especially when they challenge the accepted theories.

Very interesting theory, but…

I thought nothing could travel faster than light.

Crater 2, a large, dim satellite galaxy, exhibits properties that challenge traditional cold dark matter theories. The SIDM theory provides a better explanation, suggesting dark matter interactions that reduce density and increase galaxy size, matching observations.

Crater 2, located approximately 380,000 light years from Earth, is one of the largest satellite galaxies of the Milky Way. Extremely cold and with slow-moving stars, Crater 2 has low surface brightness. How this galaxy originated remains unclear.

Challenges in Understanding Crater 2.

The Fireball collaboration at CERN has generated a powerful electron-positron plasma beam to study black hole jets, significantly advancing our understanding of these cosmic phenomena and supporting simulations with experimental data. Credit: SciTechDaily.com.

The Fireball collaboration used CERN ’s HiRadMat facility to produce an analog of the jets of matter and antimatter that stream out of some black holes and neutron stars.

At CERN’s HiRadMat facility, researchers have created a high-density electron-positron plasma beam that mimics astrophysical jets from black holes, providing new insights into space phenomena. These experiments help validate theoretical models with real-world data, paving the way for deeper understanding of cosmic events like black hole jets.

[2023 APCTP Spring Colloquium] Wormholes and quantum entanglement.

Date: 10 March, 2023
Speaker: Prof. Juan Maldacena.

We describe various types of wormholes in general relativity. We willmention which wormholes are allowed and which ones are forbidden, bothclassically and quantum mechanically. We will describe the connectionbetween wormholes and entanglement, in the particular case of entangledblack holes.

This new picture of the month from the NASA/ESA/CSA James Webb Space Telescope features the gravitational lensing of the quasar known as RX J1131-1231, located roughly six billion light-years from Earth in the constellation Crater.

It is considered one of the best lensed quasars discovered to date, as the foreground galaxy smears the image of the background quasar into a bright arc and creates four images of the object.

Gravitational lensing, first predicted by Einstein, offers a rare opportunity to study regions close to the black hole in , by acting as a natural telescope and magnifying the light from these sources. All matter in the universe warps the space around itself, with larger masses producing a stronger effect.