
20220323: Where Is The Center of The Universe?
 03:04: General relativity can be used to calculate the spacetime curvature produced by the Earth or the Sun to determine their gravitational effects.


20220223: Are Cosmic Strings Cracks in the Universe?
 10:09: ... The other way to spot cosmic strings also relies on a gravitational effect: gravitational lensing  which is the warping of background ...


20220127: How Does Gravity Escape A Black Hole?
 01:55: When you use those equations to calculate the speed of various gravitational effects, they also turn out to be the speed of light.
 08:54: To experience the gravitational effect of a massive object, the information about the presence of that mass does have to be able to reach you.
 09:12: ... below the event horizon, but we can see its past mass, and it’s the gravitational effect of the past mass that we actually ...


20220119: How To Build The Universe in a Computer
 06:00: ... to clump particles together and consider only their summed gravitational effect. ...


20210224: Does Time Cause Gravity?
 10:56: ... inflation it’s believed that quantum gravitational effects would have been very important, so if we can get any type of signal from ...


20200518: Mapping the Multiverse
 12:23: That pressure produces its own gravitational effect on par with the black hole itself, accelerating the streams further.


20200504: How We Know The Universe is Ancient
 11:07: ...  which is mostly in dark matter  can be found by adding up the gravitational effect in galaxies and in galaxy clusters, and also by tracking the past ...


20190806: What Caused the Big Bang?
 02:43: Mostly, the stuff in the universe pulls the universe back together; resists the expansion with a positive gravitational effect.
 02:50: But there's one type of energy that can have an anti gravitational effect.


20190424: No Dark Matter = Proof of Dark Matter?
 00:03: ... of Dunkel materia a dark matter invisible to the telescope but whose gravitational effect held the cluster together as with many of his wiki's predictions like ...


20190403: The Edge of an Infinite Universe
 14:49: Every particle, every gravitational effect in the bulk is represented by quantum fields on an infinitely distant surface.


20190220: Secrets of the Cosmic Microwave Background
 07:42: ... in the Universe Energy results in positive curvature due to its positive gravitational effect On the other hand an expanding universe with no energy would have ...


20190124: The Crisis in Cosmology
 01:42: ...the rate of expansion of the universe, combined with the gravitational effect...


20190109: Are Dark Matter And Dark Energy The Same?
 03:10: ... has competing effects – its positive energy density gives it a positive gravitational effect but its negative pressure is ...
 04:06: Forgetting that pressure stuff for a moment, positive masses and energies always have a positive gravitational effect.


20180920: Quantum Gravity and the Hardest Problem in Physics
 04:38: ... that approach completely fails when you have strong gravitational effects on the smaller scales of space and time, like the central singularity of ...
 10:46: When you have strong gravitational effects on the quantum scale, the selfenergy corrections blow up to infinity.


20180905: The Black Hole Entropy Enigma
 00:53: Also, we've seen them in their gravitational effects on their surrounding space and in the gravitational waves caused when they merge.


20171108: ZeroPoint Energy Demystified
 05:32: The gravitational effect of energy depends on its absolute value.


20171102: The Vacuum Catastrophe
 05:07: Vacuum energy should produce a gravitational effect, and a huge vacuum energy should produce a huge gravitational effect.


20171025: The Missing Mass Mystery
 11:21: A nonzero vacuum energy would have a gravitational effect.


20170215: Telescopes of Tomorrow
 09:06: ... the distant universe as their brightnesses fluctuate due to the changing gravitational effect of nearby massive ...


20161214: Escape The Kugelblitz Challenge
 04:42: Now, light has energy and so has a gravitational effect.


20161109: Did Dark Energy Just Disappear?
 00:52: They expected to see that this expansion rate was slowing down due to the gravitational effect of all of the matter in the universe.
 06:35: ... dark energy, and there are things that slow expansion, which is just the gravitational effect of regular energy, and that's mostly dark matter, but also stars, ...
 11:03: ... measure tells us that there has to be something out there countering the gravitational effect of matter and flattening the geometry of ...


20160420: Why the Universe Needs Dark Energy
 00:52: ... of the universe and the resistance to this expansion due to the gravitational effect of everything it ...
 10:28: ... of the universe does include dark matter, which we can measure by its gravitational effect in several independent ...


20160413: Will the Universe Expand Forever?
 05:40: But that oomph is resisted by the gravitational effect of all the master and energy in the universe.


20160106: The True Nature of Matter and Mass
 01:22: Let's ignore the gravitational effect of mass for the moment, and just consider mass as the degree to which an object resists being accelerated.


20150819: Do Events Inside Black Holes Happen?
 13:33: ... are gravitational effects from the Sun and Moon that do the same thing, but they're highly, highly ...


20150702: Can a Circle Be a Straight Line?
 01:57: We'll end up seeing that all the supposedly gravitational effects on motion can be accounted for just by the geometry of spacetime.
