Comments on: 'Laser Comb' To Measure the Accelerating Universe

By: mitra

mitra — Tue, 07 Oct 2008 01:59:16 +0000

Indian mythological "Ishwara Tatva" is very near to Dark matter/ dark energy. The subtle matter "Ishwar Tattva" is not only the cause of creation or gradual synthesis of matter (dark matter) but also the progenitor of different fields.
Initially our Universe was filled up by such a medium The medium was distributed homogeneously through out the universe having properties as under.
It was made up of very tiny particle several thousand time smaller then electron, these momentum carrying particles were moving randomly in all possible directions with tremendous speed (of the order light travels in space). These particles ordinarily exhibit all such properties as considered in kinetic theory (dark energy).
These particles agglomerate in special circumstances to make bigger and bigger particles such as nucleons and other particles. Agglomerated big particles when come closer changes the local distribution of the medium , hence creating different fields popularly known as Gravitational, Electrostatic, Weak and nuclear depending on the relative size and distance of two or more particles
It describes the creation of Universe starting from the synthesis of first nucleon to the last stage of matter “The Black Holes”…………

By: web

web — Sat, 13 Sep 2008 20:24:51 +0000

I like the fact that they are using the "Extremely Large Telescope" to do this. Because that is the scientific name. (No I'm serious.)

By: Tyler Durden

Tyler Durden — Thu, 11 Sep 2008 00:26:04 +0000

I find it sad that a post with a technology that could find a habitable planet outside our solar system gets 5 posts, and a post about how a particle collider will not (duh) kill us all gets hundreds.

Ignorance is a plague.

By: erichansa

erichansa — Wed, 10 Sep 2008 17:29:13 +0000

laser comb sounds like something you'd order for only $19.99, and they'd throw in a set of tweezers for free if you called now

By: Free Playstation 3

Free Playstation 3 — Wed, 10 Sep 2008 06:49:15 +0000

That seems like an awesome technology.

By: Tyler Durden

Tyler Durden — Tue, 09 Sep 2008 13:19:04 +0000

Impressive. Being able to measure Doppler shifts at this level of precision would allow detection of objects as small as *Earth's Moon*.

Pretty huge leap considering we can barely detect anything less than 10 times Earth's mass at the moment.

By: Bill G

Bill G — Tue, 09 Sep 2008 03:16:03 +0000

I'd be interested in the details of how they're doing this. The last time I did anything with femtosecond lasers, they put out pulses of essentially white light. This was due to the Uncertainty Principle, because such a very small delta t caused a pretty big delta E. So I'm wondering how they've managed to get precise frequencies with pulses that short.

By: Astrofiend

Astrofiend — Mon, 08 Sep 2008 23:54:46 +0000

Accurate radial velocities down to 1 cm/s! Wow – this sort of tech just blows me away no matter how much I read about it. The possibilities for discovery using such a finely tuned spectrograph are endless.

Every day I get more and more excited about what the future will bring for physics and astronomy, and indeed science in general.