Starship Asterisk*

rstevenson wrote:We seem to have some variation of this conversation every time both light years and a time interval here on Earth are mentioned together. Look at it this way...

The light from a supernova explosion that took place 11,330 years ago our time (very roughly) reached us here on Earth 330 years ago because the explosion took place 11,000 (very roughly) light years away.

The usual advice is to ignore the time something happened way over there and just think in local Earth time. The supernova happened (in our frame of reference) 330 years ago. Period.

Rob

starfalcon2 wrote:
do you believe that this star has an organized magnetic field?...is it spinning rapidly, c/s?

owlice wrote:
lol!! Oh, I was not expecting that at all, neufer!!

owlice wrote:lol!! Oh, I was not expecting that at all, neufer!!

JuanAustin wrote:
so what happens to the cooled down blob of neutrons left over if you keep going? does it just sit there in space as a blob or also disapate into nothing? what would this cooled down core of neutrons look like and feel like if approached?

JuanAustin wrote:so what happens to the cooled down blob of neutrons left over if you keep going? does it just sit there in space as a blob or also disapate into nothing? what would this cooled down core of neutrons look like and feel like if approached?

Chris Peterson wrote:

Beyond wrote:
Hmm... Six Billion tons per teaspoon. For containing no calories, that's a lot of weight If it were possible to drop a teaspoonful on the earth, i wonder how far it would sink in?

It would fall to the center of the Earth and continue a good bit of the way back through, then fall back, and oscillate that way until it sat at the center. A lot of gravitational energy would be released kinetically, as it would basically be in free fall- billions of tons moving through crust, mantle, and core at a high speed.

Beyond wrote:Hmm... Six Billion tons per teaspoon. For containing no calories, that's a lot of weight :!: If it were possible to drop a teaspoonful on the earth, i wonder how far it would sink in?

ny1b@toasst.net wrote:If the light from supernova Cassiopeia A just reached the earth 330 years ago, that means we are viewing the nova today when it was 330 years old. How did it get to be the supposedly 15 light years across in those 330 years? Warp speed explosion? Something is apparently wrong with these figures or the idea that nothing can surpass the speed of light. Norm

Neutron stars contain the densest known matter that is directly observable. One teaspoon of neutron star material weighs six billion tons. The pressure in the star's core is so high that most of the charged particles, electrons and protons, merge resulting in a star composed mostly of uncharged particles called neutrons.