View Profile: Shaula - Cosmoquest Forum

Today, 05:06 AM

Shaula replied to a thread Scientists revise Big Bang theory: there may be multiple universes in Astronomy

For example when they did this (cold spot) analysis before it was shown to be very likely to be a signal processing artefact. Hopefully these new...

4 replies | 34 view(s)

Yesterday, 07:15 PM

Shaula replied to a thread Expanding universe- without a big bang? in Space/Astronomy Questions and Answers

Rubbish. As I said. The theory does not go back to that point because the theories it is built on don't work back there. There is no need for...

29 replies | 317 view(s)

Yesterday, 05:53 PM

Shaula replied to a thread Baryon matter / dark energy ratio in the mass of universe in Against the Mainstream

The upper limit is the Bekenstein bound as you say. It is not derived from the holographic principle as you keep on slipping back to claiming. ...

43 replies | 1048 view(s)

Yesterday, 05:45 PM

Shaula replied to a thread Expanding universe- without a big bang? in Space/Astronomy Questions and Answers

A singularity is no more implied than it would be if you watched a kitten grow up and claimed that is clear change in size implied it arose from a...

29 replies | 317 view(s)

Yesterday, 04:46 PM

Shaula replied to a thread Baryon matter / dark energy ratio in the mass of universe in Against the Mainstream

Repeating your misconception about the holographic principle again?

43 replies | 1048 view(s)

Yesterday, 10:03 AM

grapes replied to a thread how do i have all my topics/posts deleted and username removed? in Forum Introductions and Feedback

We try. I can remember one poster who signed his full name to his initial post. The post was high enough quality that I was certain he'd be around...

19 replies | 1103 view(s)

Yesterday, 08:12 AM

grapes replied to a thread Mechanical advantages of rails? in Science and Technology

It's hard to imagine an alternative steel factory without some sort of rail system--you're not going to shuttle hot ladles back and forth on rubber...

45 replies | 536 view(s)

Yesterday, 05:21 AM

Shaula replied to a thread Earth does not fly off at a tangent due its high speed in many frames of reference in Astronomy

Even if it were 100% the black hole it would still not affect the Earth/Sun's speed - it would affect their velocity. Very important distinction.

7 replies | 126 view(s)

Yesterday, 05:17 AM

Shaula replied to a thread Expanding universe- without a big bang? in Space/Astronomy Questions and Answers

Big Bang theory does not actually predict a start point, in time or space. It merely says that the observable universe has expanded from a hot,...

29 replies | 317 view(s)

Yesterday, 05:13 AM

Shaula replied to a thread Will the gravity of Kepler-62e (1.6 x Earth) be stronger than Earth's? in Space/Astronomy Questions and Answers

G (big G) is the gravitational constant http://en.wikipedia.org/wiki/Gravitational_constant Little g is the acceleration due to gravity

13 replies | 163 view(s)

2013-May-20, 04:47 PM

Shaula replied to a thread Why is speed of light considered constant throughout history? in Science and Technology

Think of z as being a sort of non-linear tape measure. 0 is us. Some notable objects are: Markarian 421, closest blazar at z=0.03 or about...

30 replies | 487 view(s)

2013-May-20, 04:28 PM

Shaula replied to a thread Does the amount of dark energy increase as the universe expands? in Space/Astronomy Questions and Answers

There is the real heart of it - what does 'real meaning' mean. Conservation of energy only makes sense when it is set within a theoretical...

19 replies | 286 view(s)

2013-May-20, 05:38 AM

Shaula replied to a thread Dark energy question. in Space/Astronomy Questions and Answers

There are several possible models for dark energy right now. Cosmological constant models: Dark energy is not increasing. As space expands DE...

52 replies | 875 view(s)

2013-May-20, 05:30 AM

Shaula replied to a thread Does the amount of dark energy increase as the universe expands? in Space/Astronomy Questions and Answers

In the same way that people floating in a plane with a parabolic trajectory can be said to be levitating by antigravity.

19 replies | 286 view(s)

2013-May-20, 05:27 AM

Shaula replied to a thread Does the amount of dark energy increase as the universe expands? in Space/Astronomy Questions and Answers

But the FLRW metric incorporates the cosmological constant. So the FLRW doesn't act like one well behaved frame because metric expansion imparts a...

19 replies | 286 view(s)

2013-May-20, 03:58 AM

grapes started a thread SPF ratings for sunscreens in Small Media at Large

From USA Today today: http://m.usatoday.com/article/news/2325341 OK I might believe that SPF ratings are gimmicks, as the article says, but I'm...

5 replies | 119 view(s)

2013-May-20, 03:00 AM

grapes replied to a thread Looking for a solid pair of binoculars in Astronomical Observing, Equipment and Accessories

The last two links are the same.

6 replies | 180 view(s)

2013-May-19, 08:46 PM

Shaula replied to a thread Photon Factory in Science and Technology

Photons can only travel at c because they are massless. They are born, live and die at c. Photons are quanta of the EM field, in order to deal...

8 replies | 158 view(s)

2013-May-19, 08:43 PM

Shaula replied to a thread Dark energy question. in Space/Astronomy Questions and Answers

See my response in the other thread. Metric expansion is not the same as a 'real' velocity - matter is not being pushed apart. And energy is not...

52 replies | 875 view(s)

2013-May-19, 08:40 PM

Shaula replied to a thread Does the amount of dark energy increase as the universe expands? in Space/Astronomy Questions and Answers

Energy is only locally conserved. When you move to multiple frames in SR there is a conserved quantity related to the energy pseudo-tensor, when you...

19 replies | 286 view(s)

2013-May-19, 06:48 PM

grapes replied to a thread Machines in space in Science and Technology

Nobody else may have mentioned the effect of cosmic rays on computers and digital cameras, but that sure seems like an issue. Modern machines have a...

36 replies | 1800 view(s)

2013-May-19, 10:12 AM

grapes replied to a thread Mechanical advantages of rails? in Science and Technology

Simple physics and material strength allows one to calculate number of wheels. A single coal car carries a small hill of rock. (...

45 replies | 536 view(s)

2013-May-19, 09:27 AM

Shaula replied to a thread Why is speed of light considered constant throughout history? in Science and Technology

z is a meaure of redshift, larger numbers mean further away/older. We only see accelerating expansion from about z=0.5 to z=0 (now). Before that...

30 replies | 487 view(s)