Enter a player name to begin or load your saved progress.
Surveyor 4 was the fifth spacecraft launched in the American Surveyor program, which was aimed at lunar exploration.
Answer: False
Explanation: Surveyor 4 was the fifth spacecraft launched in the American Surveyor program. However, it was the fourth lunar lander in the series, following Surveyors 1, 3, and 5. Surveyor 2 also launched before Surveyor 4.
The primary objective of the Surveyor program was to achieve soft landings on the Moon and collect data to support future Apollo missions.
Answer: True
Explanation: The Surveyor program's principal goal was to demonstrate the feasibility of soft lunar landings and gather essential surface data, thereby providing critical support for the subsequent crewed Apollo missions.
The Surveyor 4 mission was operated by the European Space Agency (ESA).
Answer: False
Explanation: The Surveyor 4 mission was operated by the National Aeronautics and Space Administration (NASA), the United States' space agency, not the European Space Agency (ESA).
Surveyor 4 was designed as an orbiter intended to map the Moon from a distance.
Answer: False
Explanation: Surveyor 4 was designed as a lunar lander, intended to achieve a soft touchdown on the Moon's surface, not as an orbiter.
The Surveyor program, including Surveyor 4, provided crucial data that directly aided the planning of the Apollo crewed missions.
Answer: True
Explanation: The data gathered by the Surveyor program, encompassing surface photography and soil characteristics, was indispensable for the planning and execution of the Apollo crewed lunar landing missions.
Surveyor 6 landed successfully in the same region where Surveyor 4 had previously crashed.
Answer: True
Explanation: Surveyor 6 achieved a successful soft landing in November 1967 in the vicinity of Surveyor 4's intended landing site, demonstrating the capability for lunar landings in that region.
The Surveyor program's main contribution was demonstrating the feasibility of soft lunar landings.
Answer: True
Explanation: A principal contribution of the Surveyor program was successfully demonstrating the technical feasibility of executing soft landings on the lunar surface.
What was the primary purpose of the Surveyor program, which included Surveyor 4?
Answer: To achieve soft landings on the Moon and gather surface data for Apollo.
Explanation: The Surveyor program's primary objective was to demonstrate the feasibility of soft lunar landings and collect critical surface data, which directly supported the planning and execution of the Apollo crewed missions.
Which US space agency operated the Surveyor 4 mission?
Answer: National Aeronautics and Space Administration (NASA)
Explanation: The Surveyor 4 mission, like all missions in the Surveyor program, was operated by the National Aeronautics and Space Administration (NASA).
How did the Surveyor program contribute to the success of the Apollo missions?
Answer: By providing detailed maps of potential landing sites and soil analysis.
Explanation: The Surveyor program provided crucial data, including detailed lunar surface photography and soil characteristics, which were essential for planning and ensuring the safety of the crewed Apollo lunar landing missions.
Surveyor 6 is historically significant in relation to Surveyor 4 because it:
Answer: Successfully landed near Surveyor 4's crash site later that year.
Explanation: Surveyor 6 achieved a successful soft landing in November 1967, in close proximity to the presumed crash site of Surveyor 4, demonstrating the viability of landing in that region.
The Surveyor program's data was crucial for which subsequent space exploration initiative?
Answer: The Apollo program
Explanation: The data collected by the Surveyor program, including information on lunar surface conditions and landing feasibility, was critically important for the planning and success of the Apollo program's crewed lunar missions.
Hughes Aircraft was responsible for the manufacturing of the Surveyor 4 spacecraft.
Answer: True
Explanation: Hughes Aircraft was indeed the manufacturer contracted to build the Surveyor 4 spacecraft.
Surveyor 4 had a launch mass of approximately 1,037.4 kilograms.
Answer: True
Explanation: The launch mass recorded for Surveyor 4 was approximately 1,037.4 kilograms.
The dry mass of Surveyor 4 was recorded as 624 metric tons.
Answer: False
Explanation: The dry mass of Surveyor 4 was recorded as 283 kilograms, which is equivalent to 624 pounds, not 624 metric tons.
Surveyor 4's dry mass was 624 pounds, which is approximately 283 kilograms.
Answer: True
Explanation: The dry mass of Surveyor 4 was indeed recorded as 624 pounds, equivalent to approximately 283 kilograms.
What type of spacecraft was Surveyor 4?
Answer: A lunar lander
Explanation: Surveyor 4 was designed and built as a lunar lander, intended to achieve a soft touchdown on the Moon's surface.
Who manufactured the Surveyor 4 spacecraft?
Answer: Hughes Aircraft
Explanation: The Surveyor 4 spacecraft, along with the other Surveyor landers, was manufactured by Hughes Aircraft Company.
What was the dry mass of Surveyor 4 in kilograms?
Answer: 283 kg
Explanation: The dry mass of Surveyor 4 was approximately 283 kilograms (equivalent to 624 pounds).
What was the approximate launch mass of Surveyor 4?
Answer: 1,037.4 kg
Explanation: The approximate launch mass of Surveyor 4 was 1,037.4 kilograms.
The total mission duration for Surveyor 4, from launch until its last signal, exceeded 70 hours.
Answer: False
Explanation: The total mission duration for Surveyor 4, from launch until the last signal was received, was 62 hours, 9 minutes, and 1 second, which is less than 70 hours.
Surveyor 4 was launched on July 14, 1967, using a Saturn V rocket.
Answer: False
Explanation: Surveyor 4 was launched on July 14, 1967, but it utilized an Atlas LV-3C Centaur-D rocket, not a Saturn V.
The launch of Surveyor 4 occurred from the Kennedy Space Center in Florida.
Answer: False
Explanation: Surveyor 4 was launched from Cape Canaveral, Florida, specifically from Space Launch Complex 36A (LC-36A), not the Kennedy Space Center.
Surveyor 4 was launched using an Atlas LV-3C Centaur-D rocket variant designated AC-11.
Answer: True
Explanation: Surveyor 4 was launched on July 14, 1967, utilizing an Atlas LV-3C Centaur-D rocket, specifically variant AC-11.
On what date was Surveyor 4 launched?
Answer: July 14, 1967
Explanation: Surveyor 4 was launched on July 14, 1967.
What type of rocket launched Surveyor 4?
Answer: Atlas LV-3C Centaur-D
Explanation: Surveyor 4 was launched using an Atlas LV-3C Centaur-D rocket, specifically variant AC-11.
From which launch complex did Surveyor 4 lift off?
Answer: Cape Canaveral, LC-36A
Explanation: Surveyor 4 was launched from Cape Canaveral, Florida, utilizing Space Launch Complex 36A (LC-36A).
What was the total duration of Surveyor 4's mission from launch until the last signal?
Answer: Approximately 2 days, 15 hours
Explanation: The total mission duration for Surveyor 4, from its launch until the final signal was received, was 62 hours, 9 minutes, and 1 second, which equates to approximately 2 days and 15 hours.
Surveyor 4's intended landing site was the Sea of Tranquility.
Answer: False
Explanation: The intended landing target for Surveyor 4 was Sinus Medii (Central Bay), not the Sea of Tranquility.
The target coordinates for Surveyor 4's landing were near the lunar equator at approximately 1.33 degrees West longitude.
Answer: True
Explanation: Surveyor 4 was targeted for a landing near the lunar equator at approximately 0.45 degrees North latitude and 1.39 degrees West longitude, which aligns with the statement.
Communication with Surveyor 4 was lost shortly after its successful landing.
Answer: False
Explanation: Communication with Surveyor 4 was lost approximately 2.5 minutes before its scheduled touchdown, meaning it did not successfully land before contact was lost.
Surveyor 4 successfully completed its landing sequence before communication was lost.
Answer: False
Explanation: The mission failed during the terminal descent phase; communication was lost approximately 2.5 minutes before the scheduled touchdown, indicating the landing sequence was not completed.
The Surveyor 4 mission was deemed successful because it transmitted valuable data until the moment of signal loss.
Answer: False
Explanation: The mission was not deemed successful as the primary objective of a soft landing was not achieved. While data was transmitted until signal loss, the mission failed to complete its objectives.
The suspected cause of Surveyor 4's failure was a malfunction in its primary communication system.
Answer: False
Explanation: The suspected cause of Surveyor 4's failure was the potential explosion of its solid-fuel retrorocket during the final descent phase, not a malfunction in the primary communication system.
Surveyor 4's impact on the Moon occurred on July 17, 1967, at approximately 02:05 UTC.
Answer: True
Explanation: Radio contact with Surveyor 4 ceased on July 17, 1967, at approximately 02:03 UTC, and the spacecraft is presumed to have impacted the lunar surface shortly thereafter, around 02:05 UTC.
The impact site of Surveyor 4 was located in the Southern Hemisphere of the Moon.
Answer: False
Explanation: Surveyor 4's intended landing site and presumed impact location were near the lunar equator, specifically at approximately 0.45 degrees North latitude and 1.39 degrees West longitude, not in the Southern Hemisphere.
Sinus Medii, the landing target for Surveyor 4, is located near the lunar south pole.
Answer: False
Explanation: Sinus Medii, the intended landing target for Surveyor 4, is located near the lunar equator, not the lunar south pole.
Surveyor 4 lost contact with mission control roughly 150 seconds before its scheduled touchdown.
Answer: True
Explanation: Communication with Surveyor 4 was lost approximately 2.5 minutes (150 seconds) prior to its scheduled touchdown on the lunar surface.
The loss of telemetry from Surveyor 4 meant that its operational status could no longer be monitored from Earth.
Answer: True
Explanation: The loss of telemetry signifies the cessation of data transmission from the spacecraft, rendering its operational status and trajectory unmonitorable from Earth.
The mention of a 'solid-fuel retrorocket' implies Surveyor 4 used liquid fuel for its descent braking.
Answer: False
Explanation: The term 'solid-fuel retrorocket' explicitly indicates the use of solid fuel for descent braking, contradicting the implication of liquid fuel usage.
The communication blackout lasted for the entire duration of Surveyor 4's descent.
Answer: False
Explanation: The communication blackout lasted for approximately 2.5 minutes (150 seconds) before the scheduled touchdown, not the entire duration of the descent.
The suspected cause of failure involved the explosion of Surveyor 4's main descent engine.
Answer: True
Explanation: The primary suspected cause of Surveyor 4's mission failure is the potential explosion of its solid-fuel retrorocket during the final descent phase.
What was the intended landing region for Surveyor 4 on the Moon?
Answer: Sinus Medii (Central Bay)
Explanation: The intended landing region for Surveyor 4 was Sinus Medii, also known as Central Bay on the Moon.
At what approximate latitude and longitude was Surveyor 4 targeted to land?
Answer: 0.45°N, 1.39°W
Explanation: Surveyor 4 was targeted for a landing at approximately 0.45 degrees North latitude and 1.39 degrees West longitude.
When did radio communication with Surveyor 4 cease?
Answer: July 17, 1967, during final descent
Explanation: Radio communication with Surveyor 4 ceased on July 17, 1967, during its final descent phase, approximately 2.5 minutes before its scheduled touchdown.
What is the suspected cause of Surveyor 4's mission failure?
Answer: Explosion of its solid-fuel retrorocket.
Explanation: The most strongly suspected cause of Surveyor 4's mission failure is the potential explosion of its solid-fuel retrorocket near the end of its burn during the final descent.
What happened to Surveyor 4 approximately 2.5 minutes before its scheduled touchdown?
Answer: Communication was lost, and its fate became unknown.
Explanation: Approximately 2.5 minutes before its scheduled touchdown, radio communication with Surveyor 4 was lost, and its subsequent fate remained unknown.
The note 'failed landing' in the Surveyor 4 infobox indicates:
Answer: The mission did not achieve a successful touchdown.
Explanation: The note 'failed landing' explicitly signifies that Surveyor 4 did not successfully complete its primary objective of achieving a soft touchdown on the lunar surface.
What does the term 'Sinus Medii' refer to in the context of Surveyor 4?
Answer: The intended lunar landing zone.
Explanation: In the context of the Surveyor 4 mission, 'Sinus Medii' refers to the designated landing area on the Moon, also known as Central Bay.
What statement best describes the outcome of the Surveyor 4 mission?
Answer: It failed during descent after losing contact with mission control.
Explanation: The Surveyor 4 mission failed during its descent phase when communication was lost with mission control, preventing a successful landing.
Surveyor 4 carried scientific instruments including a television camera and a soil mechanics surface sampler.
Answer: True
Explanation: Surveyor 4 was equipped with scientific instruments such as a television camera, auxiliary mirrors, and a soil mechanics surface sampler.
Surveyor 4 was equipped with a tool designed to analyze the magnetic properties of lunar soil.
Answer: True
Explanation: Yes, Surveyor 4 carried a surface claw equipped with a magnet, intended to detect and measure ferrous elements within the lunar soil.
The television camera on Surveyor 4 was primarily used for navigation during the landing.
Answer: False
Explanation: The television camera's primary function was to capture images of the lunar surface for visual data and terrain analysis, not for direct navigation during the landing sequence.
The strain gauges on Surveyor 4's legs were intended to measure temperature variations on the lunar surface.
Answer: False
Explanation: The strain gauges installed on Surveyor 4's landing legs were designed to measure the forces exerted upon contact with the lunar surface, providing data on soil mechanics, not temperature variations.
Besides imaging, Surveyor 4 aimed to collect data on soil mechanics and analyze ferrous elements.
Answer: True
Explanation: In addition to imaging capabilities, Surveyor 4 was designed to gather data on soil mechanics and analyze ferrous elements using its magnetic claw.
Surveyor 4 carried a soil mechanics sampler but lacked any tools for chemical analysis.
Answer: False
Explanation: While Surveyor 4 carried a soil mechanics sampler, it also possessed a magnetic claw designed to detect and measure ferrous elements, which constitutes a form of chemical analysis.
The engineering sensors on Surveyor 4 were primarily for transmitting images back to Earth.
Answer: False
Explanation: The engineering sensors were primarily intended to monitor the spacecraft's performance and environmental conditions during its mission, not to transmit images, which was the function of the television camera.
Which of the following was NOT listed as scientific equipment carried by Surveyor 4?
Answer: Geiger counter for radiation measurement
Explanation: The scientific equipment documented for Surveyor 4 included a television camera, a soil mechanics surface sampler, and strain gauges on its landing legs. A Geiger counter was not listed among its instruments.
What tool did Surveyor 4 carry to help detect ferrous elements in the lunar soil?
Answer: A surface claw with a magnet
Explanation: Surveyor 4 was equipped with a surface claw that contained a magnet, designed specifically to detect and measure the presence of ferrous elements within the lunar soil.
The purpose of the strain gauges on Surveyor 4's landing legs was to:
Answer: Record the forces exerted upon touchdown.
Explanation: The strain gauges were installed on Surveyor 4's landing legs to measure the forces experienced by the legs upon contact with the lunar surface, providing data on soil properties.
Surveyor 4's international designation was 1967-068A.
Answer: True
Explanation: The international designation, or COSPAR ID, assigned to Surveyor 4 was 1967-068A, indicating the year of launch and its sequence.
The 'stub' classification indicates the Surveyor 4 article is a comprehensive and complete historical account.
Answer: False
Explanation: A 'stub' classification signifies that an article is a basic outline and requires further expansion, indicating it is not comprehensive or complete.
The 'References' section lists external websites related to Surveyor 4.
Answer: False
Explanation: The 'References' section typically lists sources used for verification, such as publications or official reports. External websites are usually found in an 'External links' section.
The Wikimedia Commons link provides access to images and videos related to Surveyor 4.
Answer: True
Explanation: The Wikimedia Commons link directs users to a repository of media files, including images and videos, pertaining to Surveyor 4.
The infobox at the beginning of the article summarizes key technical specifications and mission details of Surveyor 4.
Answer: True
Explanation: The infobox serves as a concise summary, presenting essential technical specifications and mission details of Surveyor 4 at the beginning of the article.
Navigation boxes (navboxes) link Surveyor 4 to other related space missions and topics.
Answer: True
Explanation: Navigation boxes, commonly found at the bottom of articles, serve to connect the current topic (Surveyor 4) with related articles, facilitating thematic exploration.
The COSPAR ID 1967-068A uniquely identifies Surveyor 4 and indicates its launch year.
Answer: True
Explanation: The COSPAR ID 1967-068A serves as a unique international identifier for Surveyor 4, with the '1967' component denoting the year of its launch.
The SATCAT number 02875 is a designation used for tracking celestial bodies like asteroids.
Answer: False
Explanation: The SATCAT number 02875 is a designation used for tracking artificial objects in space, such as satellites and spacecraft like Surveyor 4, not celestial bodies like asteroids.
Which of the following identifiers is associated with Surveyor 4?
Answer: SATCAT Number: 02875
Explanation: The SATCAT number 02875 is an identifier associated with Surveyor 4, used for tracking artificial objects in space. The COSPAR ID was 1967-068A.
What does the 'stub' classification at the end of the article convey?
Answer: The article is a basic outline needing further expansion.
Explanation: The 'stub' classification indicates that the article is a preliminary version requiring further development and expansion to become more comprehensive.