Vianna, Hélio.

And that's why helium's called helium.

Helium is a gas.

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

(2011) Directed by Hélio Goldsztejn.

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

Muonic helium is created by substituting a muon for one of the electrons in helium 4.

Stars on the main sequence convert hydrogen into helium, creating a slowly but steadily increasing proportion of helium in the core.

Helios discovered the two and alerted Hephaestus.

Petrochemicals, including asphalt, often exhibit this behavior.

The helium atoms had to be very far apart.

Instead it just becomes mildly larger and more luminous over about 100 million years as it continues to burn helium in the core.

And now simple atoms appear of hydrogen and helium.

This is a high altitude helium balloon.

Jupiter is made mostly of hydrogen and helium gases.

U.S. Geological Survey publications on helium beginning 1996 Helium Where is all the helium?

ZENAIDE, Hélio Nóbrega, Epitácio Pessoa , Editora A União, 2000.

Now helium's a gas, there're a lot of reasons why helium's good, it's a tiny molecule, it's inert, it doesn't give you narcosis.

Twenty five years later, helium was isolated on Earth.

nebulae, nebulæ, or nebulas) is an interstellar cloud of dust, hydrogen, helium and other ionized gases.

In 1868, Norman Lockyer hypothesized that these absorption lines were caused by a new element that he dubbed helium , after the Greek Sun god Helios.

Helium 3 boils at 3.19 K compared with helium 4 at 4.23 K, and its critical point is also lower at 3.35 K, compared with helium 4 at 5.2 K. Helium 3 has less than one half of the density when it is at its boiling point 59 gram per liter compared to the 125 gram per liter of helium 4 at a pressure of one atmosphere.

Jupiter is made mostly of hydrogen and helium gases.

Uranus' atmosphere is made up of hydrogen, helium, and methane.

SILVA, Hélio, Nilo Peçanha 7º Presidente do Brasil , Editora Três, 1983.

SILVA, Hélio, Epitácio Pessoa 11º Presidente do Brasil , Editora Três, 1984.

Commonly used are ppm (parts per million, ), ppb (parts per billion, ), ppt (parts per trillion, ) and ppq (parts per quadrillion, ).

The helion, the nucleus of a helium 3 atom, consists of two protons but only one neutron, in contrast with two neutrons in common helium.

the number of helium atoms per molecule of gas, is in the upper troposphere, which corresponds to a mass fraction .

This value is close to the protosolar helium mass fraction of , indicating that helium has not settled in its centre as it has in the gas giants.

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

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

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

Only 0.8 of the energy generated in the Sun comes from the CNO cycle.

Atmosphere The outer atmosphere of Saturn contains 96.3 molecular hydrogen and 3.25 helium by volume.

SILVA, Hélio, Costa e Silva 23º Presidente do Brasil , Editora Três, 1983.

After his fight with Hélio, Santana was challenged by Carlson Gracie, Hélio's nephew.

The equivalent of Helios in Roman mythology was Sol, specifically Sol Invictus.

Evolution of Earth's atmosphere Earliest atmosphere The first atmosphere would have consisted of gases in the solar nebula, primarily hydrogen.

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.

Light gases, such as hydrogen and helium typically have high thermal conductivity.

Chemically, muonic helium, possessing an unpaired valence electron, can bond with other atoms, and behaves more like a hydrogen atom than an inert helium atom.

A star of less than about half the mass of the Sun will be unable to ignite helium fusion (as noted earlier), and will produce a white dwarf composed chiefly of helium.

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