Helium

We need helium, and the helium is what we really need to go deep.

And unfortunately, the helium atoms in liquid helium are right on top of each other.

And that's why helium's called helium.

This is a high altitude helium balloon.

It's that shape because the helium has to expand.

And now simple atoms appear of hydrogen and helium.

The helium atoms had to be very far apart.

So, that's that process there. Deuterium and tritium goes together makes helium 5.

In the 1950s, people were trying to figure out how superfluid helium worked.

The first one was that when helium atoms touch each other, they repel.

The universe was about 75 percent hydrogen, 25 percent helium. It still is today.

For a moment they become helium 5, because they've got five particles inside them.

Helium splits out, and a neutron comes out and lots of energy comes out.

Helium 3 very rare on the surface of the Earth, very common in space.

In the middle of stars, you're joining hydrogen together to make helium and then helium together to make carbon, to make oxygen, all the things that you're made of are made in the middle of stars.

After about a few minutes, there was hydrogen and helium in the universe. That's all.

It consisted of huge clouds of hydrogen and helium atoms, and they have no structure.

The only way it worked is when the helium atoms were very, very far apart.

Those two trucks you see at the very end carry 12 tanks each of compressed helium.

Here's the balloon being filled up with helium, and you can see it's a gorgeous sight.

So where you get slightly denser areas, gravity starts compacting clouds of hydrogen and helium atoms.

(f) Data processing and interpretation of the ULYSSES GAS experiment on the distribution of interstellar helium.

Feynman decided, as a sort of amateur helium physicist, that he would try to figure it out.

I've always wondered whether the professionals, the real professional helium physicists, were just a little bit embarrassed by this.

20. The Ariane high pressure helium tanks are designed to be emptied within a few hours via a calibrated orifice.

For instance, here they are laying down the balloon fabric behind, which is eventually going to be filled up with helium.

After about 400 million years, the first stars formed, and that hydrogen, that helium, then began to cook into the heavier elements.

4.2.3.6.3 Shells intended for the transport of helium can be filled up to but not above the inlet of the pressure relief device.

And you make if from lithium. That reaction at the bottom, that's lithium 6, plus a neutron, will give you more helium, plus tritium.

The implication of that is that the wave function has to go to zero, it has to vanish when the helium atoms touch each other.

The thing was that that simple thing that he wrote down explained everything that was known at the time about liquid helium and then some.

Analysis indicated that with residual propellants, the nitrogen tetroxide and helium could be heated to temperatures that would generate pressure exceeding the strength of the material.

We, all of us, are what happens when a primordial mixture of hydrogen and helium evolves for so long that it begins to ask where it came from.

C. Space debris reduction practices NASDA has implemented the draining of residual propellants (LOX, LH2, N2H4) and residual helium gas of the H I H II second stage.

21. NASDA has implemented the draining of residual propellants (LOX, LH2, N2H4) and residual helium gas of the second stage of the H I and H II launcher.

And what they have to do is they have to assemble the entire balloon the fabric, parachute and everything on the ice and then fill it up with helium.

And the element helium was discovered just by staring at the light from the Sun because some of those black lines were found that corresponded to no known element.

Storage and supply facilities (for liquid hydrogen, liquid oxygen, helium and nitrogen) and facilities to supply water and electricity are designed for common use by the Complex and adjacent installations.

The Japanese space agency NASDA has implemented the draining of residual propellants (LOX, LH2, N2H4) and residual helium gas of the second stage of the H I H II launcher.

In order to avoid significant accidental debris creation, NASDA has implemented draining of residual propellants (LOX, LH2, N2H4) and the residual helium gas of the H I H II second stage.

The discovery of helium in the constellation of Cetus, which is 13 billion light years away, gives scientists valuable information about conditions at the time of the universe apos s initial evolution.

After injection, up to 4 tonnes of the oxidizer and its vapours, up to 2 tonnes of the fuel and up to 60 kg of gaseous helium can still remain in tanks.

Then in July 1994, an international team of astronomers using HST apos s Faint Object Camera confirmed that helium is widespread throughout the early universe, a key hypothesis of the Big Bang theory.

Now, the reason we were able to come up with this is two key ideas One is that this is similar to a cryogenic Dewar, something you'd keep liquid nitrogen or liquid helium in.