He independently derived Tsiolkovsky's rocket equation, did basic calculations about the energy required to make round trips to the Moon and planets, and he proposed the use of atomic power ( i. e. Radium ) to power a jet drive.

Solar-thermal monoprop thrusters are also integral to the design of a next-generation cryogenic upper stage rocket proposed by U. S. company United Launch Alliance ( ULA ).

Robert Bussard proposed the Single-Stage-To-Orbit " Aspen " vehicle using a nuclear thermal rocket for propulsion and liquid hydrogen propellant for partial shielding against neutron back scattering in the lower atmosphere.

An alternative liquid-core design, the nuclear salt-water rocket has been proposed by Robert Zubrin.

A nuclear salt-water rocket ( or NSWR ) is a proposed type of nuclear thermal rocket designed by Robert Zubrin that would be fueled by water bearing dissolved salts of Plutonium or U < sup > 235 </ sup >.

Jordin Kare has proposed a simpler, nearer term concept which has a rocket containing liquid hydrogen and water.

The surest way of building a fusion rocket with current technology is to use hydrogen bombs as proposed in Project Orion, but such a spacecraft would also be massive.

Bussard proposed a ramjet variant of a fusion rocket capable of reasonable interstellar spaceflight, using enormous electromagnetic fields ( ranging from kilometers to many thousands of kilometers in diameter ) as a ram scoop to collect and compress hydrogen from the interstellar medium.

An antimatter rocket is a proposed class of rockets that use antimatter as their power source.

The advantage to this class of rocket is that a large fraction of the rest mass of a matter / antimatter mixture may be converted to energy, allowing antimatter rockets to have a far higher energy density and specific impulse than any other proposed class of rocket.

Most proposed antimatter rocket designs require a large amount of antimatter ( around 10 grams to reach Mars in one month ).

In 1955, Ulam and C. J. Everett proposed, in contrast to Rover's continuous heating of rocket exhaust, to harness small nuclear explosions for propulsion.

" Two years later, he proposed an experimental program in which a rocket might be instrumented to explore the upper atmosphere, including detection of ultraviolet radiation and X-rays at high altitudes ".

On February 14, 2008, when NASA proposed research into nuclear thermal rockets, Technobahn, a scientific journal in Japan, referred to the usage of nuclear thermal rocket engines on mobile suits in the Gundam universe.

* Liberty ( rocket ), a proposed rocket for crew and cargo

Several rocket designs using this reaction were proposed, ones using all-fission for interplanetary missions, and others using fission-fusion ( effectively a very small version of Orion's bombs ) for interstellar ones.

In 1922, Oberth's proposed doctoral dissertation on rocket science was rejected as " utopian ".

The proposed sale never happened, because the Army found it needed the land for the new mission of developing and testing rocket systems.

Although von Braun had proposed in 1954 that the OML could place a satellite in Earth orbit, the Naval Research Laboratory, using its Vanguard rocket, was given this assignment.

In September 1954, von Braun, proposed using the Redstone rocket as the main booster of a multi-stage rocket for launching artificial satellites.

Within this frame of reference policies appropriate to claims advanced in the name of the Jews depend upon which Jewish identity is involved, as well as upon the nature of the claim, the characteristics of the claimant, the justifications proposed, and the predispositions of the community decision makers who are called upon to act.

The trouble with all these doctrinal quarrels is that we hear only one side of the story: what, in the secret councils of the Kremlin, Molotov had really proposed, we just don't know, and he has had no chance to reply.

It should be kept in mind that the ease or difficulty with which a town or city can convert to the proposed plan is directly dependent upon the financial condition of that town or city.

However, there is a more profound consideration to this proposed merger than profit and loss.

In the 10-year period, it is proposed that insect and disease control on the National Forest System be stepped up to a level of prevention, detection, and control of insect and disease infestations that will substantially reduce the occurrence of large infestations toward the end of the initial period.

It is proposed that in 10 years all commercial timberlands, all critical watersheds, and other lands in the National Forest System developed or proposed for intensive use will be given protection from fire adequate to meet the fire situation in the worst years and under serious peak loads.

Legislation has already been proposed to authorize the sale of these Government-owned systems in Alaska, and its early enactment is desirable.

On the other hand, the new authority of $3,825 million proposed for missile procurement ( excluding research and construction ) in 1961 is $581 million higher than for 1960.

Upon receipt of an application which the Export-Import Bank is prepared to consider, the Export-Import Bank will inform the Department of Economic Affairs of the identity of the applicant, the nature of the proposed business, the amount of the proposed loan, and the general purposes for which the loan proceeds would be expended.

When the Export-Import Bank is prepared to act favorably upon an application, it will so notify the Department of Economic Affairs and will indicate the interest rate and the repayment period which would be used under the proposed loan.

Within sixty days after the receipt of notice that the Export-Import Bank is prepared to act favorably upon an application the Department of Economic Affairs will indicate to the Export-Import Bank whether or not the Department of Economic Affairs has any objection to the proposed loan.

It is proposed that in the future complete sampling censuses be carried out at five-year intervals.

According to the theory proposed, this is a consequence of the severe condition of perceived threat that persists unabated for the anxious child in an ambiguous sort of school environment.

Obviously, the goal here proposed is the guiding principle in Mr. Justice Frankfurter's opinions -- to the extent that Congress leaves the problem to judicial discretion.

Hoping to cut down on such works, Udall had proposed that a politician be at least fifty years departed before he is memorialized.

and to them it will seem insignificant that it is proposed to defeat such causes non-violently.

A technique by which it is proposed to enter with compulsion into the very heart of a man and determine his values may often in fact seem the more unlimited aggression.

Nevertheless, the consequence of the policy proposed is everywhere subtly qualified: it is `` a possible result, however improbable '' ; ;

Ashlag proposed that such a framework is the purpose of creation, and everything that happens is to raise humanity to the level of altruism, love for one another.

Among the proposed etymologies is the Hurrian and Hittite divinity, Aplu, who was widely invoked during the " plague years ".

In music an " answer " ( also known as countersubject ) is the technical name in counterpoint for the repetition or modification by one part or instrument of a theme proposed by another.