NASA

On April 8, 1964, Gemini 1 successfully completed the first uncrewed test flight of the Gemini spacecraft and its Titan II booster. The three-orbit mission proved the structural integrity of the spacecraft and the launch vehicle, paving the way for a second uncrewed test flight and ultimately missions with astronauts. The primary goals of Project Gemini included proving the techniques required for the Apollo Program to fulfill President John F. Kennedy’s goal of landing a man on the Moon and returning him safely to Earth before the end of the decade. Of primary importance, Gemini demonstrated the rendezvous and docking techniques necessary to implement the Lunar Orbit Rendezvous method NASA chose for the Moon landing mission. Additionally, Gemini proved that astronauts could work outside their spacecraft during spacewalks and that spacecraft and astronauts could function for at least eight days, considered the minimum time for a roundtrip lunar mission.

Left: Cutaway diagram of the Gemini spacecraft. Middle: Workers at the McDonnell plant in St. Louis examine a Gemini spacecraft mockup. Right: Workers at Martin Marietta’s Baltimore facility test Gemini 1’s Titan II rocket.

Wedged between the pioneering Project Mercury and the historic Apollo missions to the Moon lies the less-heralded Project Gemini. The project’s 12 missions, two uncrewed test flights and 10 crewed missions, bridged the gap between Mercury that proved human spaceflight possible, and that Apollo could achieve President Kennedy’s goal. The Gemini missions flown between April 1964 and November 1966 demonstrated all the techniques required to make Apollo possible and gave astronauts the necessary training and flight experience while maturing the ground support infrastructure. The Gemini spacecraft grew out of studies for an upgraded Mercury capsule with an extended orbital life that could carry two astronauts and maneuver in space. On Dec. 7, 1961, NASA approved the development of the two-seat spacecraft, giving the contract to the McDonnell Corporation of St. Louis, the same company that built Mercury. To launch the spacecraft, NASA ordered the modification of the U.S. Air Force’s Titan II missile, built by the Martin Marietta Corporation in Baltimore. On Jan. 13, 1962, NASA officially named the project Gemini and established a formal Gemini Project Office later that month. But before any astronauts took flight aboard a Gemini spacecraft, it required thorough testing with a crew.

Left: The first stage of Gemini 1’s Titan II rocket arrives at Cape Canaveral’s Launch Pad 19. Middle left: Static test of the Titan II’s two stages. Middle right: Workers lift Gemini 1 to mate it with its Titan II rocket. Right: Workers lower Gemini 1 onto its Titan II rocket.

The agency approved the Gemini spacecraft design on March 31, 1962. The first spacecraft for the uncrewed Gemini 1 test mission arrived at Cape Canaveral on Oct. 4, 1963. In lieu of the two crew ejection seats, the spacecraft contained instrument pallets to monitor and record conditions during the mission. The Titan II rocket for Gemini 1 arrived at Cape Canaveral on Oct. 26 and three days later workers first stacked its two stages in a side-by-side configuration on Launch Pad 19 to prepare for the sequence compatibility test. That test, successfully carried out on Jan. 21, 1964, consisted of 30-second sequential static firings of the two stages. Following the test, workers vertically stacked the two stages and on March 5 mounted and mechanically mated the Gemini spacecraft to the second stage. Engineers completed a simulated countdown on April 2 and a simulated flight test on April 5, leading to the start of the countdown to launch on April 7.

Left: Liftoff of Gemini 1 from Launch Pad 19. Middle: Aerial view of Gemini 1 rising from Launch Pad 19. Right: Gemini 1 continues its ascent to space.

On April 8, 1964, at 11:00 a.m. EST, Gemini 1 lifted off from Launch Pad 19. The primary objectives of the mission included verifying the structural integrity of the Titan II launch vehicle and the Gemini spacecraft, and the ability of the rocket to place the spacecraft into the proper orbit. After five minutes and 37 seconds of powered flight, during which the expended first stage dropped away and the second stage completed the ascent, Gemini 1, still attached to the second stage, achieved orbit. The slightly higher than expected velocity imparted to the spacecraft resulted in placing it in an orbit 21 miles higher than expected, an anomaly not considered serious.

Left: The Mission Control Center (MCC) at NASA’s Kennedy Space Center in Florida. Middle: In the MCC, Flight Directors Christopher C. Kraft, left, and John D. Hodge, monitor the Gemini 1 mission. Right: In the auditorium of the Manned Spacecraft Center (MSC), now NASA’s Johnson Space Center in Houston, MSC Director Robert R. Gilruth introduces the Gemini 3 crew to the press.

In the Gemini Mission Control Center at NASA’s Kennedy Space Center in Florida, Flight Director Christopher C. Kraft led a team of flight controllers that monitored all aspects of the flight. The flight plan called for Gemini 1 to remain attached to its second stage for the duration of its mission that included only the first three orbits and ended about 4 hours 50 minutes after launch, with no plans to recover the spacecraft. The worldwide network continued to track Gemini 1 until it reentered the atmosphere on April 12, on its 64th orbit, over the southern Atlantic Ocean. Program managers declared the mission an unqualified success. The success of Gemini 1 led to optimism that NASA could carry out Gemini 2, a suborbital uncrewed test flight, in August 1964, followed by Gemini 3, the first crewed mission in November – the missions actually took place in January and March 1965, respectively. Riding on the optimism, on April 13, just five days after Gemini 1, in the newly open auditorium at the Manned Spacecraft Center (MSC), now NASA’s Johnson Space Center in Houston, MSC Director Robert R. Gilruth introduced the Gemini 3 crew to the press. NASA assigned Mercury 4 veteran Virgil I. “Gus” Grissom and Group 2 astronaut John W. Young as the prime crew, with Mercury 8 veteran Walter M. Schirra and Group 2 astronaut Thomas P. Stafford serving as their backups.

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Preparations for Next Moonwalk Simulations Underway (and Underwater) The original Mercury astronauts at the McDonnell Aircraft Corp. in May 1959. The astronauts are left to right: M. Scott Carpenter, L. Gordon Cooper Jr., John H. Glenn Jr., Virgil I. “Gus” Grissom, Walter M. “Wally” Schirra, Alan B. Shepard Jr., and Donald K. “Deke” Slayton.NASA The Mercury 7

On April 9, 1959, reporters and news media crammed into the ballroom of the Dolley Madison House in Washington—the location of NASA Headquarters at that time—to learn the names of the first American astronauts who came to be known as the Mercury 7. Public Information Director Walter Bonney kicked off the announcement by pointing to the seven men sitting on stage. “These are our astronaut volunteers,” he announced. “Take your pictures as you will, gentlemen.” One of those men on the dais, Deke Slayton, a test pilot from Edwards Air Force Base, recalled the pandemonium he witnessed. “I’ve never seen anything like it, before or since.” He described the event as, “a frenzy of light bulbs and questions…it was some kind of roar.” His colleague, Wally Schirra, a test pilot from Naval Air Station Patuxent River, called the media’s interest scary because he soon came to realize that their, “private lives were in jeopardy.”

I've never seen anything like it, before or since.

Deke Slayton

Former NASA Astronaut

The first class of astronauts were all test pilots: Scott Carpenter, Gordon Cooper, John Glenn, Gus Grissom, Wally Schirra, Alan Shepard, and Deke Slayton. The men, as the media reported, had similar backgrounds, education, and skills. Obvious connections also included their age and race: all were white men in their thirties. Every one of them was married, had children, and were Protestants. They even donned similar outfits that day: suits with white shirts and ties.

The seven Mercury astronauts pose around a boiler plate capsule. Counterclockwise from the top left they are Walter M. Schirra, John H. Glenn Jr., Donald K. Slayton, Virgil I. Grissom, Alan B. Shepard Jr., M. Scott Carpenter, and Gordon Cooper Jr.NASA

Throughout the sixties, NASA considered jet pilot experience an important skill for anyone in the astronaut corps. Even when NASA selected two groups of scientist-astronauts, one in 1965 and another in 1967, they too learned to fly high-speed aircraft. Those without military jet pilot experience attended a year-long course that the Air Force called Undergraduate Pilot Training, and once they completed the program, they became military-qualified jet pilots.

Watch the story of the selection and training of the Mercury astronauts on NASA+ Adding Diversity to the Astronaut Corps

In the summer of 1976, NASA announced the space agency would be accepting applications for the first class of Space Shuttle astronauts, and encouraged women and minorities to apply. Almost 20 years after that first astronaut announcement, NASA included six women and four minority astronaut candidates in the 1978 class. Of the 35 selected, 15 were named pilots and 20 were mission specialists (scientists who would perform experiments in space and spacewalks). All the pilot astronauts named had similar backgrounds to the Mercury 7. Like their predecessors, they were white male test pilots with backgrounds in aviation, engineering, and science with one unique distinction: Frederick D. Gregory, an African American research test pilot from the NASA Langley Research Center in Virginia. It was not until 1990 that Eileen Collins, a graduate of U.S. Air Force Test Pilot School, became NASA’s first female pilot astronaut. Unlike the earlier scientist-astronauts, the mission specialists selected in 1978 and later classes did not have the opportunity to become military qualified jet pilots. They were required, however, to fly a certain number of hours per month in the back seat of a T-38, a jet trainer the pilot astronauts use to maintain their flight proficiency.

The astronaut class of 1978 was NASA’s first new group of astronauts since 1969. This class was notable for many reasons, including having the first African-American and Asian-American astronauts, and the first women.NASA

Even as NASA encouraged women and minorities to apply to be astronauts over the years, and more met the basic qualifications as they earned advanced degrees in engineering, medicine, and science, neither group was ever a majority of those selected as candidates. It was more than fifty years before women made up half of those selected in 2013; people of color have never been a majority of any class. Recent astronaut classes are more likely to reflect America’s diverse population, including the last group to be selected in 2021. This group, called the “Flies,” included several minority candidates and four women. (The class, which graduated in March 2024, also included two international astronauts from the United Arab Emirates, and all are now eligible for a flight assignment.) Flight experience continues to remain important, however. Of the ten Americans selected, four were test pilots. Another, Major Nichole Ayers, was a combat aviator from the United States Air Force.

NASA’s 2021 astronaut class graduated on Mar. 5, 2024. The 10 candidates, pictured here in an event at Ellington Field near NASA’s Johnson Space Center in Houston are Nichole Ayers, Christopher Williams, Luke Delaney, Jessica Wittner, Anil Menon, Marcos Berríos, Jack Hathaway, Christina Birch, Deniz Burnham, and Andre Douglas. UAE Astronaut Candidates Nora AlMatrooshi and Mohammad AlMulla stand alongside them. NASA/Robert Markowitz The Artemis II Crew

Almost 64 years to the day after the Mercury 7 announcement, NASA and CSA (Canadian Space Agency) revealed the names of the four astronauts assigned to the Artemis II mission. The flight will test and prove that the Orion spacecraft’s systems—including its life support, communication, and navigation systems—function as they were designed while a crew is aboard, ahead of future crewed missions to the Moon.

As NASA Administrator Bill Nelson introduced the crew, which included a woman, a person of color, and a Canadian national, he identified them as representatives of America’s creed: “E pluribus unum—out of many, one.” The four-member team included Commander Reid Wiseman, Pilot Victor Glover, and Mission Specialists Christina Koch and Jeremy Hansen. (Half of this crew came from the 2013 astronaut class, which was equally weighted between men and women.) Artemis II will be the first crewed mission to circle the Moon since Apollo. NASA’s Artemis Generation represents a distinct shift from the sixties—when white men from the United States of America landed on the Moon—and hopes to inspire and engage the next generation by demonstrating that space is for everyone, no matter their race or gender. This crew exemplifies the global coalition NASA has built and its commitment to include international partners as well as commercial partners in this grand adventure.

NASA astronauts (left to right) Reid Wiseman, Victor Glover, and Christina Koch, and CSA (Canadian Space Agency) astronaut Jeremy Hansen were assigned to fly on the Artemis II mission to the Moon.NASA

Like many who came before them, three of the four astronauts assigned to this historic mission are military-qualified jet pilots. Wiseman and Glover were both test pilots; Hansen flew as a fighter pilot for the Canadian Air Force. Test pilots regularly assess how new vehicles perform and have experience evaluating experimental aircraft. Astronauts with backgrounds as test pilots have traditionally been among those selected to fly new spacecraft for the first time. They have a strong understanding of the systems that they are monitoring, which helps them to identify and gather the type of data the space agency is seeking from this flight. The safety of future Artemis crews depends on this information.

While the Astronaut Office might look different from how it did in 1959, the decision to select test pilots for the first class of astronauts continues to influence and shape ideas about who is best suited to be an astronaut and fly in space. They are accustomed to working in a fast-paced environment and thrive under pressure. Bob Gilruth, the father of human spaceflight, called the decision to select test pilots to fly on Project Mercury in 1959, “one of the best decisions in the program. It made it quite simple and logical to delegate flight control and command functions to the pilot,” of the spacecraft. The importance of that decision continues to endure today.

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Details Last Updated Apr 05, 2024 Related Terms

• NASA History
• Artemis 2
• Astronauts
• Becoming an Astronaut
• Project Mercury

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3 Min Read NASA Names Finalists of the Power to Explore Challenge A word cloud generated from student essay entries. Credits: NASA/Dave Lam NASA has selected the nine finalists of the Power to Explore Challenge, a national competition for K-12 students featuring the enabling power of radioisotopes.

NASA selected nine finalists out of the 45 semifinalist student essays in the Power to Explore Challenge, a national competition for K-12 students featuring the enabling power of radioisotopes. Contestants were challenged to explore how NASA has powered some of its most famous science missions and to dream up how their personal “super power” would energize their success on their own radioisotope-powered science mission.

The competition asked students to learn about NASA’s Radioisotope Power Systems (RPS), a type of “nuclear battery” that the agency uses to explore some of the most extreme destinations in our solar system and beyond. As cities across the United States experience a total solar eclipse, we experience first hand a momentary glimpse into what life would be like without sunlight. This draws attention to how NASA can power missions at destinations that cannot rely on the energy of the Sun, such as deep craters on the Moon and deep space exploration. In 250 words or less, students wrote about a mission of their own enabled by these space power systems and described their own power to achieve their mission goals.

The Power to Explore Challenge offered students the opportunity to learn more about these reliable power systems, celebrate their own strengths, and interact with NASA’s diverse workforce. This year’s contest received 1,787 submitted entries from 48 states and Puerto Rico.

"The RPS Program is so impressed by the ideas and quality of writing that come forth from essays submitted to NASA’s Power to Explore Challenge

Carl Sandifer

Manager, Radioisotope Power Systems Program

“The RPS Program is so impressed by the ideas and quality of writing that come forth from essays submitted to NASA’s Power to Explore Challenge,” said Carl Sandifer, NASA’s manager for the Radioisotope Power Systems Program in Cleveland. “We would like to congratulate the finalists, and we look forward to welcoming the winners to NASA’s Glenn Research Center this summer.”

Entries were split into three categories: grades K-4, 5-8, and 9-12. Every student who submitted an entry received a digital certificate and an invitation to the Power Up virtual event that announced the semifinalists. Students learned about what powers the NASA workforce to dream big and work together to explore.

Three national finalists in each grade category (nine finalists total) have been selected. In addition to receiving a NASA RPS prize pack, these participants will be invited to an exclusive virtual meeting with a NASA engineer or scientist to talk about their missions and have their space exploration questions answered. Winners will be announced on April 17.

Grades K-4

• Katerine Leon, Long Beach, CA
• Rainie Lin, Lexington, KY
• Zachary Tolchin, Guilford, CT

Grades 5-8

• Aadya Karthik, Redmond, WA
• Andrew Tavares, Bridgewater, MA
• Sara Wang, Henderson, NV

Grades 9-12

• Thomas Liu, Ridgewood, NJ
• Madeline Male, Fairway, KS
• Kailey Thomas, Las Vegas, NV

About the Challenge

The challenge is funded by the Radioisotope Power Systems Program Office in NASA’s Science Mission Directorate and administered by Future Engineers under the NASA Open Innovation Services 2 contract. This contract is managed by the NASA Tournament Lab, a part of the Prizes, Challenges, and Crowdsourcing Program in NASA’s Space Technology Mission Directorate.

Kristin Jansen
NASA’s Glenn Research Center

The summer of 2023 was Earth’s hottest since global records began in 1880, according to scientists at NASA’s Goddard Institute of Space Studies (GISS) in New York.

El verano boreal de 2023 fue el más caluroso para la Tierra desde que se establecieron registros mundiales de temperaturas en 1880, según un análisis realizado por científicos del Instituto Goddard de Estudios Espaciales (GISS, por sus siglas en inglés) de la NASA en Nueva York.