Category Archives: cosmology

Aliens, Gods and their pets

God or owner? (ebook)

Pellor: ornamental race of pets owned by Architect Krull  (Blog)

Pets

  • Are we the pets of an almighty Alien or God?
  • Are you a pet owner?
  • Do you treat your pet well?
  • Do you expect your pet to pray for forgiveness when it wets to carpet or sing your praises night and morning?
  • Do human make good pets?
  • As pets are we interesting enough to makeup  for being smelly bald monkeys with no tails?
  • What are the insurance costs of keeping such dangerous creatures like us?
  • Is destroying the planet worse than wetting the carpet?

The owner

  • Who owns this star system or for that matter this galaxy?
  • Has the owner noticed we exist? Will he be pleased when he finds out?
  • Does the owner consider us to be pests or pets?
  • Did he make the planet himself or did he get contractors in to finish off the mountains?
  • Are we his only pets?
  • Maybe he bought the planet for the dinosaurs and got bored when they died out.

Gods

  • Whats with wanting all these prayers?
  • Maybe the owner hates all the spam he gets?
  • Are we capable of saying anything in our prayers that a god would find interesting?
  • Why would a god be so insecure that he needs a load of little bald monkeys to tell him how great he is?
  • As for “creating us in his image.” If anything is asking for lightning bolt that is.

 

Black Matter

black matter

Comet ice is black and in the darkness of interstellar space it is very black

Could dark matter just be black Interstellar comets?

Comet ice is black and interstellar space is cold, dark and vast. Star systems are only tiny specks in that cold vastness. What if there is a tiny sprinkling of ice out there between the stars?

Scientists have built enormous subterranean experiments to detect dark matter, the mysterious source of gravity that stops galaxies flying apart as they spin through space. These machines are looking for WIMPS (weakly interacting massive particles) that can travel though the Earth without noticing. But could there be a more boring source of this gravity?

What if Dark Matter was just building sized lumps of ice floating between the stars could we detect it?

Well surprisingly simple maths says we could not detect it.

The local dark matter density is about the mass of a third of proton per cubic metre.

That is  5.56×10-25 g/cm3 ( Tiny number: 5.56 divided by 10 twenty-five times)

The density of ice is 1 g/cm3

So to account for the mass of dark matter in interstellar space there only needs to be one volume of ice to every 1.8×1024 volumes of empty space.

For 10 metre building sized objects that is only one per 1.8×1027 cubic metres of space.
(Massive number 1.8 multiplied by 10 twenty-seven times) (lots of zeros on the end)
So we are talking about building sized icy objects 1.2 million kilometres apart.

If these objects are buzzing around through space the average distance they would travel before colliding with another lump of ice (mean free path) is 1.27×1025 metres or 1,342,419,000 light years. This means one of these objects would on average travel for tens of billions of years before colliding with another piece of ice.

How would we try and detect these objects?

What if we try pointing a telescope at a bright star watching for  dark objects crossing on front of it? How far away could we see a black building sized object against a bright star? Lets guess at 10AU (ten times the distance of us from the Sun).

Black object crossing star

Black object crossing star

Detectable volume between us and star out to 10AU could be about 7×1014 cubic metres.

Probability of block of ice being in that volume = 7×1014 / 1.8×1027 =3.93×10-13.

So what would we expect to see? What does a probability of 3.93×10-13 mean?

Well, if these objects are slow-moving and take one second to cross the face of the star, we could expect an event every 1/(3.93e-13)=2.5445×1012 seconds or 80,632 years

Fast moving objects could only take a millisecond to flash across the star as we watch. Then we would only have to wait 80 years between events.

We might just stand a chance of spotting something if we could make telescopes that can monitor thousands of stars at a frame rates of thousands of frames per second. Remember normal telescopes use long exposure times far too slow for this type of work.

Why, what when?

sim

What questions to ask

42 is as good an answer as any when you ask questions like “What is the meaning of life the universe and everything?”

So this blog will stick to questions that could have a real answer in the future. Will the answers be discovered next week or in a million years time? What kind of question is that? Some questions are more fun to ask than others. Why ask dull questions?

As this is my blog, I will concentrate on Astrophysics, Cosmology and religion. So questions like: Are dark-matter and dark-energy just names for error terms? Do gods exist? Why is one god the current fashion over the many gods preferred in the past? I will stick clear of questions like: Why are women obsessed with shoes?

Dangerous questions:

Should some questions never be asked? Do we really want to know the answers to some questions? Do we know what questions we will really regret asking?

  • Is the universe a computer simulation?
  • Is life on Earth just a bug or glitch in the simulation.
  • Is someone trying to fix the bug right now?
  • Are gods high level subroutines in the simulation that create worlds?
  • Does someone have their mouse over the “End simulation” button right now?
  • In Genesis, someone said, “god created us in his image.” That is like calling god a primitive balding monkey with no tail and bad eyesight etc. Do I want to know what punishment that guy got?
  • How long do I have to live and how will I die?
  • What happens if I press this?
  • Is that a real gun?
  • What happens to people that can prove gods or aliens exist?
  • Is big bang cosmology a concept implanted by aliens to dead-end our technological development?

Awkward questions:

Just asking some questions will upset people. Some will upset friends or relatives others scientist or religious people.

  • If your parents had not been religious would you believe in god?
  • Why is there a picture of a postman in with my old baby things?
  • Any question about angular momentum in astrophysics.
  • If you were a god would you want people to get down on their knees to you?
  • Did god really make the Earth or did he buy it ready-made?
  • If the rate of expansion of the universe is increasing why can we detect nothing in the last ten million years?
  • Can we ever spend enough money on dark matter detectors to prove it does not exist?

My questions:

Coming soon in this blog.

  • What could dark matter be?
  • Are there alternatives to standard cosmology? (Would I ask the question if I did not think so?)
  • Where does the angular momentum is galaxies come from?
  • When a protostar shrinks from light-months across down to only a few light-seconds where does the angular momentum go?
  • Would civilisation exist without religion? Have we really evolved beyond the need for religion?
  • Are all religions base on social control mechanisms?
  • Are prophets and messiahs a violation of the prime directive?