Menu
News
All News
Dungeons & Dragons
Level Up: Advanced 5th Edition
Pathfinder
Starfinder
Warhammer
2d20 System
Year Zero Engine
Industry News
Reviews
Dragon Reflections
Columns
Weekly Digests
Weekly News Digest
Freebies, Sales & Bundles
RPG Print News
RPG Crowdfunding News
Game Content
ENterplanetary DimENsions
Mythological Figures
Opinion
Worlds of Design
Peregrine's Next
RPG Evolution
Other Columns
From the Freelancing Frontline
Monster ENcyclopedia
WotC/TSR Alumni Look Back
4 Hours w/RSD (Ryan Dancey)
The Road to 3E (Jonathan Tweet)
Greenwood's Realms (Ed Greenwood)
Drawmij's TSR (Jim Ward)
Community
Forums & Topics
Forum List
Latest Posts
Forum list
*Dungeons & Dragons
Level Up: Advanced 5th Edition
D&D Older Editions
*TTRPGs General
*Pathfinder & Starfinder
EN Publishing
*Geek Talk & Media
Search forums
Chat/Discord
Resources
Wiki
Pages
Latest activity
Media
New media
New comments
Search media
Downloads
Latest reviews
Search resources
EN Publishing
Store
EN5ider
Adventures in ZEITGEIST
Awfully Cheerful Engine
What's OLD is NEW
Judge Dredd & The Worlds Of 2000AD
War of the Burning Sky
Level Up: Advanced 5E
Events & Releases
Upcoming Events
Private Events
Featured Events
Socials!
Twitch
YouTube
Facebook (EN Publishing)
Facebook (EN World)
Twitter
Instagram
TikTok
Podcast
Features
Top 5 RPGs Compiled Charts 2004-Present
Adventure Game Industry Market Research Summary (RPGs) V1.0
Ryan Dancey: Acquiring TSR
Q&A With Gary Gygax
D&D Rules FAQs
TSR, WotC, & Paizo: A Comparative History
D&D Pronunciation Guide
Million Dollar TTRPG Kickstarters
Tabletop RPG Podcast Hall of Fame
Eric Noah's Unofficial D&D 3rd Edition News
D&D in the Mainstream
D&D & RPG History
About Morrus
Log in
Register
What's new
Search
Search
Search titles only
By:
Forums & Topics
Forum List
Latest Posts
Forum list
*Dungeons & Dragons
Level Up: Advanced 5th Edition
D&D Older Editions
*TTRPGs General
*Pathfinder & Starfinder
EN Publishing
*Geek Talk & Media
Search forums
Chat/Discord
Menu
Log in
Register
Install the app
Install
Community
General Tabletop Discussion
*Geek Talk & Media
World Science: Signs of dark matter found?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Umbran" data-source="post: 4570400" data-attributes="member: 177"><p>Black holes eat everything. They don't care about the differences between types of particles. It's all food <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /></p><p></p><p></p><p></p><p></p><p>Yes. Every known force in the universe can be seen as being transmitted by a particle (photons for electromagnetism, gravitons for gravity, and so on). As particles, they are limited in speed.</p><p></p><p></p><p></p><p>Um, yes and no.</p><p></p><p>The force of gravity one feels from a given object is dependent on two things - the mass of the object, and the distance from the object. Specifically, the force you feel goes like 1/d^2. So, if the object is really small, you can get really close to it, and the force you feel gets really, really big. </p><p></p><p>This is what happens to black holes. When the star runs out of fuel, the pressure of the outflowing energy drops off, and stops holding the mass of a star up, so it begins to collapse. If the star has enough mass, there is no force in the universe that'll stop that collapse. Ever. It collapses down to to the point where at the surface of the star, the force of gravity is so strong that even light cannot escape from the surface. The force isn't infinite, just very strong.</p><p></p><p>But the collapse doesn't stop there. Nothing stops it. It just keeps going. We can't see it, but it just keeps on collapsing down to a mathematical point - at that point, technically the force of gravity on any object would be infinite. </p><p></p><p></p><p></p><p></p><p></p><p>No. But that requires some explanation.</p><p></p><p>As far as we can see, the Universe was born with some total amount of energy. No new energy has ever been created - it just swaps back and forth between being energy and various forms of matter. Whether or not the Universe will experience a "Big Crunch" depends upon that total, not on local conditions.</p><p></p><p>Black holes are just one place into which some of the mass/energy falls. It doesn't create "more gravity" by doing so. At large distances, gravitationally a black hole and a star of the same mass look the same. It is only when you get close to the hole that things get weird. So, the universe as a whole doesn't care if you have a black hole or a bunch of stars.</p></blockquote><p></p>
[QUOTE="Umbran, post: 4570400, member: 177"] Black holes eat everything. They don't care about the differences between types of particles. It's all food :) Yes. Every known force in the universe can be seen as being transmitted by a particle (photons for electromagnetism, gravitons for gravity, and so on). As particles, they are limited in speed. Um, yes and no. The force of gravity one feels from a given object is dependent on two things - the mass of the object, and the distance from the object. Specifically, the force you feel goes like 1/d^2. So, if the object is really small, you can get really close to it, and the force you feel gets really, really big. This is what happens to black holes. When the star runs out of fuel, the pressure of the outflowing energy drops off, and stops holding the mass of a star up, so it begins to collapse. If the star has enough mass, there is no force in the universe that'll stop that collapse. Ever. It collapses down to to the point where at the surface of the star, the force of gravity is so strong that even light cannot escape from the surface. The force isn't infinite, just very strong. But the collapse doesn't stop there. Nothing stops it. It just keeps going. We can't see it, but it just keeps on collapsing down to a mathematical point - at that point, technically the force of gravity on any object would be infinite. No. But that requires some explanation. As far as we can see, the Universe was born with some total amount of energy. No new energy has ever been created - it just swaps back and forth between being energy and various forms of matter. Whether or not the Universe will experience a "Big Crunch" depends upon that total, not on local conditions. Black holes are just one place into which some of the mass/energy falls. It doesn't create "more gravity" by doing so. At large distances, gravitationally a black hole and a star of the same mass look the same. It is only when you get close to the hole that things get weird. So, the universe as a whole doesn't care if you have a black hole or a bunch of stars. [/QUOTE]
Insert quotes…
Verification
Post reply
Community
General Tabletop Discussion
*Geek Talk & Media
World Science: Signs of dark matter found?
Top