Question: Konstantin Tsiolkovsky and what American credited with creating and building the world's first liquid-fueled rocket, made  theoretical and practical breakthroughs for spaceflight?

Context paragraphs:
1590 Tsiolkovskaja: 1590 Tsiolkovskaja, provisional designation 1933 NA, is a stony Flora asteroid from the inner regions of the asteroid belt, approximately 11 kilometers in diameter.  It was discovered on 1 July 1933, by Soviet–Russian astronomer Grigory Neujmin at Simeiz Observatory, on the Crimean peninsula.  It was named for rocket scientist Konstantin Tsiolkovsky.

Robert H. Goddard: Robert Hutchings Goddard (October 5, 1882 – August 10, 1945) was an American engineer, professor, physicist, and inventor who is credited with creating and building the world's first liquid-fueled rocket.  Goddard successfully launched his model on March 16, 1926, ushering in an era of space flight and innovation.  He and his team launched 34 rockets between 1926 and 1941, achieving altitudes as high as 2.6 km and speeds as fast as 885 km/h (550 mph).

Takeoff (film): Take-Off (Russian: Взлёт , "Vzlyot " ) is a 1979 Soviet biopic about the Russian rocket scientist Konstantin Tsiolkovsky, directed by Savva Kulish and based on a screenplay by Oleg Osetinsky.

History of spaceflight: Spaceflight became part of human achievement in the 20th century following theoretical and practical breakthroughs by Konstantin Tsiolkovsky and Robert H. Goddard.  The Soviet Union took the lead in the post-war Space Race, launching the first satellite, the first man and the first woman into orbit.  The United States caught up with, and then passed, their Soviet rivals during the mid-1960s, landing the first man on the Moon in 1969.  In the same period, France, the United Kingdom, Japan and China were concurrently developing more limited launch capabilities.

Reaction Motors: Reaction Motors, Inc. (RMI) was an early American maker of liquid-fueled rocket engines, located in New Jersey.  RMI engines with 6000 lbf thrust powered the Bell X-1 rocket aircraft that first broke the sound barrier in 1947, and later successors including the X-1A, X1E, and the Douglas D-558-2 Skyrocket.  A 20000 lbf thrust RMI engine also powered the Viking research rocket, the first large liquid-fueled US high-altitude rocket.  RMI was merged with Thiokol in 1958, where it produced the XLR-99 engine that powered the X-15 rocket aircraft.

Goddard Rocket Launching Site: The Goddard Rocket Launching Site is a National Historic Landmark commemorating the launch site of the world's first successful liquid-fueled rocket.  It is located at 20 Upland Street, Auburn, Massachusetts, within the Pakachoag Golf Course.  The launch site is indicated with two markers accessible to visitors while the golf course is open.  It is at the "9th Fairway, between Tee and Green," of the Pakachoag Golf Course.

Friedrich Zander: Friedrich Zander (Russian: Фридрих Артурович Цандер "Fridrikh Arturovich Tsander".  Latvian: "Frīdrihs Canders" , 11 August [O.S. 23 August] 1887 – 28 March 1933), was a Baltic German pioneer of rocketry and spaceflight in the Russian Empire and the Soviet Union.  He designed the first liquid-fueled rocket to be launched in the Soviet Union, GIRD-X, and made many important theoretical contributions to the road to space.

William Leitch (scientist): William Leitch (May 20, 1814 – May 9, 1864) was a Presbyterian minister who was born in Scotland, studied mathematics and science at the University of Glasgow, and moved to Canada in 1860 to take a post at Queen's University.  Space historian Robert Godwin published in October 2015 his discovery that Leitch gave the first modern scientific explanation of the potential for space exploration using rockets (1861).  He was said to be "a distinguished astronomer, naturalist and mathematician", and his proposal for rocket spaceflight came four decades prior to more well-known proposals by Konstantin Tsiolkovsky (1903), Robert Esnault-Pelterie (1913), Robert H. Goddard (1914), and Hermann Oberth (1923).  Leitch's rocket spaceflight description was first provided in his 1861 essay "A Journey Through Space", which was later published in his book "God's Glory in the Heavens" (1862).  This description correctly attributed rocket thrust to the "internal reaction" (Newton's laws of motion) and correctly identified that rocket thrust is most effective in the vacuum of space.

Science and technology in the Soviet Union: In the Soviet Union, science and technology served as an important part of national politics, practices, and identity.  From the time of Lenin until the dissolution of the USSR in the early 1990s, both science and technology were intimately linked to the ideology and practical functioning of the Soviet state, and were pursued along paths both similar and distinct from models in other countries.  Many great scientists, who worked in Imperial Russia (like, e.g. Konstantin Tsiolkovsky), continued to work in the USSR and gave birth to Soviet science.

ARS (rocket family): The ARS rocket family was a series of rockets developed by the American Interplanetary Society — later the American Rocket Society — during the 1930s.  Based on the German Mirak rocket, it used a liquid-fueled rocket engine, powered by liquid oxygen and gasoline propellants.  The first successful launch, of the ARS-2, took place on May 14, 1933.  The design was modified and refined by successive rockets; the last launch of an ARS rocket took place on May 9, 1937.

Supporting paragraphs: History of spaceflight Robert H. Goddard
Answer: Robert H. Goddard