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Robert Goddard: The Father of Modern Rocket Propulsion

Robert Hutchings Goddard, 1882 - 1945

Robert Hutchings Goddard, 1882 - 1945

Fun Facts About Robert Goddard

Dr. Robert H. GoddardThe father of modern rocket propulsion is the American, Dr. Robert Hutchings Goddard. Along with Konstantin Eduordovich Tsiolkovsky of Russia and Hermann Oberth of Germany, Goddard envisioned the exploration of space. A physicist of great insight, Goddard also had an unique genius for invention.

By 1926, Goddard had constructed and tested successfully the first rocket using liquid fuel. Indeed, the flight of Goddard’s rocket on March 16,1926, at Auburn, Massachusetts, was a feat as epochal in history as that of the Wright brothers at Kitty Hawk. Yet, it was one of Goddard’s “firsts” in the now booming significance of rocket propulsion in the fields of military missilery and the scientific exploration of space.

Primitive in their day as the achievement of the Wrights, Goddard’s rockets made little impression upon government officials. Only through the modest subsidies of the Smithsonian Institution and the Daniel Guggenheim Foundation, as well as the leaves of absence granted him by Worcester Polytechnic Institute of Clark University, was Goddard able to sustain his lifetime of devoted research and testing. He worked for the U.S. Navy in both World Wars. Eighteen years after his successful demonstration at Auburn, Goddard’s pioneering achievements came to life in the German V-2 ballistic missile.

Goddard first obtained public notice in 1907 in a cloud of smoke from a powder rocket fired in the basement of the physics building in Worcester Polytechnic Institute. School officials took an immediate interest in the work of student Goddard. They, to their credit, did not expel him. He thus began his lifetime of dedicated work.

In 1914, Goddard received two U.S. patents. One was for a rocket using liquid fuel. The other was for a two or three stage rocket using solid fuel. At his own expense, he began to make systematic studies about propulsion provided by various types of gunpowder. His classic document was a study that he wrote in 1916 requesting funds of the Smithsonian Institution so that he could continue his research. This was later published along with his subsequent research and Navy work in a Smithsonian Miscellaneous Publication No. 2540 (January 1920). It was entitled “A Method of Reaching Extreme Altitudes.” In this treatise, he detailed his search for methods of raising weather recording instruments higher than sounding balloons. In this search, as he related, he developed the mathematical theories of rocket propulsion.

Towards the end of his 1920 report, Goddard outlined the possibility of a rocket reaching the moon and exploding a load of flash powder there to mark its arrival. The bulk of his scientific report to the Smithsonian was a dry explanation of how he used the $5000 grant in his research. Yet, the press picked up Goddard’ s scientific proposal about a rocket flight to the moon and erected a journalistic controversy concerning the feasibility of such a thing. Much ridicule came Goddard’s way. And he reached firm convictions about the virtues of the press corps which he held for the rest of his life. Yet, several score of the 1750 copies of the 1920 Smithsonian report reached Europe. The German Rocket Society was formed in 1927, and the German Army began its rocket program in 1931. Goddard’s greatest engineering contributions were made during his work in the 1920’s and 1930’s (see list of historic firsts). He received a total of $10,000 from the Smithsonian by 1927, and through the personal efforts of Charles A. Lindbergh, he subsequently received financial support from the Daniel and Florence Guggenheim Foundation. Progress on all of his work was published in “Liquid Propellant Rocket Development,” which was published by the Smithsonian in 1936.

Diagram of Goddard's rocket design

Diagram of Goddard's rocket design

Goddard’s work largely anticipated in technical detail the later German V-2 missiles, including gyroscopic control, steering by means of vanes in the jet stream of the rocket motor, gimbalsteering, power-driven fuel pumps and other devices. His rocket flight in 1929 carried the first scientific payload, a barometer, and a camera. Goddard developed and demonstrated the basic idea of the “bazooka” two days before the Armistice in 1918 at the Aberdeen Proving Ground. His launching platform was a music rack. Dr. Clarence N. Hickman, a young Ph.D. from Clark University, worked with Goddard in 1918 provided continuity to the research that produced the World War II bazooka. In World War II, Goddard again offered his services and was assigned by the U.S. Navy to the development of practical jet assisted takeoff (JATO) and liquid propellant rocket motors capable of variable thrust. In both areas, he was successful. He died on August 10,1945, four days after the first atomic bomb was dropped on Japan.

Goddard was the first scientist who not only realized the potentialities of missiles and space flight but also contributed directly in bringing them to practical realization. This rare talent in both creative science and practical engineering places Goddard well above the opposite numbers among the European rocket pioneers. The dedicated labors of this modest man went largely unrecognized in the United States until the dawn of what is now called the “space age.” High honors and wide acclaim, belated but richly deserved, now come to the name of Robert H. Goddard.

On September 16, 1959, the 86th Congress authorized the issuance of a gold meal in the honor of Professor Robert H. Goddard.

In memory of the brilliant scientist, a major space science laboratory, NASA’s Goddard Space Flight Center, Greenbelt, Maryland, was established on May 1, 1959.

 

GODDARD’S HISTORIC FIRSTS

Titan 23G Rocket

Titan 23G Rocket

Robert H. Goddard’s basic contribution to missilery and space flight is a lengthy list. As such, it is an eloquent testimonial to his lifetime of work in establishing and demonstrating the fundamental principles of rocket propulsion.

  • First explored mathematically the practicality of using rocket propulsion to reach high & altitudes and even the moon (1912);
  • First proved, by actual static test, that a rocket will work in a vacuum, that it needs no air to push against;
  • First developed and shot a liquid fuel rocket, March 16,1926;
  • First shot a scientific payload (barometer and camera) in a rocket flight (1929, Auburn, Massachusetts);
  • First used vanes in the rocket motor blast for guidance (1932, New Mexico);
  • First developed gyro control apparatus for rocket flight (1932, New Mexico);
  • First received U.S. patent in idea of multi-stage rocket (1914);
  • First developed pumps suitable for rocket fuels;
  • First launched successfully a rocket with a motor pivoted on gimbals under the influence of a & gyro mechanism (1937). 

 

Special thanks to nasa.gov

 

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Pluto: The former planet still fascinates and intrigues

Pluto with moons:  Charon, Nix and Hydra

Pluto with moons: Charon, Nix and Hydra

Fun Facts About Pluto

 

1. Pluto has an atmosphere

Even though Pluto’s average temperature averages a mere 44 degrees above absolute zero, the dwarf planet has an atmosphere. Not an atmosphere as we know it, but an atmosphere, none the less.

It was first discovered back in 1985, when astronomers watched as Pluto passed in front of a star. They were able to calculate a slight dimming as its atmosphere passed in front of the star, before Pluto itself blocked the star entirely. From those observations, they were able to calculate that it has a thin envelope of nitrogen, methane and carbon dioxide.

As Pluto moves away from the Sun, this atmosphere gets so cold that it freezes onto the surface. And then as the dwarf planet warms again, the atmosphere evaporates again, forming a gas around it.

2. Pluto has 3 moons

You might have heard that Pluto has a large moon called Charon, but did you know that it actually has 3 moons in total. Charon is the large one, with a mass of roughly half that of Pluto’s.

Two additional moons, Nix and Hydra, were discovered by astronomers using the Hubble Space Telescope on May 15, 2005. They were originally called S/2005 P1 and S/2005 P2, and then given their final names on June 21, 2006.

They took a long time to discover because they’re so tiny. Nix is only 46 km across, while Hydra is 61 km across.

3. Pluto hasn’t cleared out its orbit

Although Pluto orbits the Sun and it’s round, it’s not a planet. And that’s because Pluto hasn’t cleared out its orbit of material. This was the reason that the International Astronomical Union chose to demote it from planet to dwarf planet in 2006.

Just to give you an idea, if you added up the mass of all the other objects in Pluto’s orbit, Pluto’s mass would only be a tiny fraction of that total. In fact, it would only be 0.07 times as massive as everything else. For comparison, if you did the same thing with all the other material in the Earth’s orbit, our planet would be 1.5 million times as massive.

And that’s why Pluto’s not a planet.

4. Pluto is actually a binary system


You’d think that Charon orbits Pluto, but actually, Pluto and Charon orbit a common point in space. In the case of the Earth and the Moon, we actually orbit a common point, but that spot exists inside the Earth. In the case of Pluto and Charon, however, that common point is above the surface of Pluto.

Before Pluto was downgraded to a dwarf planet, astronomers were thinking of classifying it as a binary planet system. And then as a binary dwarf planet system. Perhaps that will help it recover some of its lost glory.

5. Pluto is named after a god, not a dog

If you think Pluto is named after a Disney character, you’re wrong. It’s actually named after the Roman god of the underworld. And Charon is the ferryman who carries souls across the river Styx.

When it was first discovered, Pluto was just given the name Planet X, but then the discoverers needed to come up with something better and more permanent. The name Pluto was suggested by Venetia Burney, an 11-year old school girl in Oxford, England. She thought it was a good name for such a cold, dark world. It was passed along to the discoverers and they liked it enough to make it official.

6. Pluto can be closer than Neptune

For most of its orbit, Pluto is more distant than Neptune, reaching out as far as 49 astronomical units (49 times the distance from the Earth to the Sun). But it has such an eccentric, elliptical orbit that it gets much closer, reaching a mere 29 AU. And during that time, it’s actually orbiting within the orbit of Neptune. The last time Pluto and Neptune made this switch was between February 7, 1979 and February 11, 1999. And give it another couple of hundred years and it’ll happen again.

7. Pluto is smaller than any planet, and even 7 moons

Pluto is small. How small? Astronomers recently calculated that its mass is 1.31 x 1022 kg (less than 0.24% the mass of Earth). And its diameter is only 2,390 km across.

At this point, it’s smaller than Mercury, and seven other moons including: Ganymede, Titan, Callisto, Io, Earth’s Moon, Europa, and Triton.

And now astronomers know that it’s even smaller than the recently discovered dwarf planet Eris. Here’s more information about how big Pluto is.

8. If it were closer to the Sun, Pluto would be a comet

Although this isn’t officially a reason for losing its planet status, Pluto wouldn’t last long if it got much closer to the Sun. It’s comprised of about half rock and half ice. This is a similar ratio to many rocky comets in the Solar System.

If you could somehow bring Pluto closer to the Sun, it would sprout a tail, becoming a spectacular comet. And over millions of years, the solar wind would blast away its icy structure, causing it to lose mass.

It’s lucky Pluto lives in such a cold, dark part of the Solar System.

9. Charon might have geysers

In the last few years, astronomers have discovered that several objects in the Solar System have ice geysers, including Saturn’s moon Enceladus, and maybe several others as well. But Pluto’s moon Charon could have this happening too.

Astronomers using the Gemini Observatory in Mauna Kea in Hawaii recently turned up evidence that geysers on Charon are spreading ammonia hydrates and water crystals across the surface of the moon.

Is this really happening? We’ll know soon, because… here’s the last Pluto fact.

10. There’s a spacecraft going to Pluto right now

NASA’s New Horizons spacecraft is making its way to Pluto right now. The spacecraft launched in 2005, and its expected to reach the dwarf planet in 2015. It will pass right through the system, imaging the surface of Pluto and its moons, and finally answering questions that have puzzled astronomers for nearly a hundred years.

 

Special thanks to www.universetoday.com

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