Most Massive Galaxy Cluster of Early Universe Discovered

[moparacer]

7 billion light-years

Talk about a road trip!

 

[CZroe]

I think you read it wrong. It WEIGHS as much as 800 trillion Suns.

But, if you're floating around in space, aren't you weightless?
:awe:

Not if you accelerating.
Though yeah a pointless measurement in space.

Mass has weight. They're talking about mass.

Mass has no weight. Weight is a subjective measurement. The same amount of mass can have an infinite number of possible weights, including 0.

ATOMIC weight.

Atomic weight is not a weight, nor is it constant.

You're right. It's a measurement of mass, which is what we were talking about.

No we weren't. We were talking about how horrible this article was. Not to mention it is impossible for anyone to say how much mass exists in another galaxy, let alone our own.

FOLLOW

A fixed mass has weight relative to another mass. That relevance is directly proportional to each mass' atomic weight. It is relevant even hanging "weightlessly" in space with no other significant gravitational forces acting upon it, which becomes plainly obvious when you apply basic Newtonian physics, like equal and opposite reactions (try to move it), which is precisely what Matthiasa was talking about.

We were talking about weight and mass and they are relevant.

And, obviously, it's not impossible to estimate how much mass there is.

 

[Malak]

FOLLOW

A fixed mass has weight relative to another mass. That relevance is directly proportional to each mass' atomic weight. It is relevant even hanging "weightlessly" in space with no other significant gravitational forces acting upon it, which becomes plainly obvious when you apply basic Newtonian physics, like equal and opposite reactions (try to move it), which is precisely what Matthiasa was talking about.

We were talking about weight and mass and they are relevant.

And, obviously, it's not impossible to estimate how much mass there is.

We can barely see stars in other galaxies with the strongest telescopes. We don't have enough data to estimate mass, but some scientists obviously love to put up big numbers to sound impressive. We use gravitational theories to even speculate the mass of our own star.

The point is, the article is meant to be awe-inspiring, but isn't necessarily accurate.

 

[CZroe]

We can barely see stars in other galaxies with the strongest telescopes. We don't have enough data to estimate mass, but some scientists obviously love to put up big numbers to sound impressive. We use gravitational theories to even speculate the mass of our own star.

The point is, the article is meant to be awe-inspiring, but isn't necessarily accurate.

We use lots of things including spectral analysis to determine composition and make direct size measurements to fit into the calculations.

Mass spectrometers, tidal pull, planetary orbits, all that is used to refine our estimates of our own sun's mass. Obviously, it's MORE refined than most more distant measurements, but the techniques only help us more accurately determine those as well by using our own sun as a reference.

All estimates are speculative and based on our theories.

 

[DrPizza]

Why do you claim that there isn't enough data to estimate the mass? You frequently seem to be anti-science. And, "we use gravitational theories to even speculate the mass of our own star" is ridiculous.

Hey everyone! If you let go of a rock, it *might* not fall down! It's "only a theory" according to Malak. Never mind that we have satellites in space that are mapping the gravitational field of the earth to the nearest meter; it's "just a theory."

 

[Acanthus]

Knowing how many total stars in the universe exist is impossible but one estimate is
70,000,000,000,000,000,000,000 stars

http://articles.cnn.com/2003-07-22/tech/stars.survey_1_sextillion-big-number-universe?_s=PM:TECH

Yeah, nasas best guess is 70 sextillion (7x10^22). They even they said that number is likely much much higher.

 

[Malak]

Why do you claim that there isn't enough data to estimate the mass? You frequently seem to be anti-science. And, "we use gravitational theories to even speculate the mass of our own star" is ridiculous.

Hey everyone! If you let go of a rock, it *might* not fall down! It's "only a theory" according to Malak. Never mind that we have satellites in space that are mapping the gravitational field of the earth to the nearest meter; it's "just a theory."

I'm not anti-science, I love science. I'm anti-thisiswhatitisbecauseIsaidso.

If you let go of a rock at a certain speed and elevation, it won't fall down. Newton said as much.