A Day in Astronomy: Launch of Ranger 4 Lunar Probe

Posted on by onespaceman2000
Image (Credit): The Ranger 4 problem. (NASA/JPL)

On this day in 1962, the United States launched the Ranger 4 lunar probe from Cape Canaveral. Its mission was to photograph the lunar surface, place scientific equipment on the Moon, and perform other tests before crashing into the surface of the Moon. A computer glitch caused the probe to crash on the far side of the Moon before it could send back any useful data. Nonetheless, it was the first US spacecraft to reach another moon or planet (the Soviets had reached the Moon in 1959) as well as the first spacecraft to reach the far side of the Moon.

NASA launched a total of nine probes to the Moon under the Ranger program, with the last missions – Rangers 7,8, and 9 – being successful. Rangers 1 and 2 never left Earth orbit, while Rangers 3 and 5 missed the moon altogether. As noted above, Ranger 4 made it to the Moon, but not where is was supposed to land. And Ranger 6 made it to the Moon, but experienced a camera failure.

The Ranger missions set the stage for the later Apollo missions, which allowed the US to put the first man on the Moon.

Note: This NASA paper, Lunar Impact: A History of Project Ranger, provides greater detail on the earlier missions.

Space Stories: Safe Return of Astronaut & Cosmonauts from ISS, Resupply of ISS Successful, and Continuing Concerns About ISS Risks

Posted on by onespaceman2000
Image (Credit): The Soyuz MS-26 spacecraft carrying Expedition 72 NASA astronaut Don Pettit, and Roscosmos cosmonauts Alexey Ovchinin and Ivan Vagner back to Earth from the ISS on April 19, 2025 (April 20, 2025, Kazakhstan time). (NASA/Bill Ingalls)

Here are some recent stories of interest related to the International Space Station (ISS).

—ABC News: “Capsule with 1 American, 2 Russians returns to Earth from International Space Station“

A Soyuz capsule carrying two Russians and one American from the International Space Station landed Sunday in Kazakhstan, ending their seven-month research assignment. According to Russian space agency Roscosmos, the capsule carrying Roscosmos cosmonauts Alexey Ovchinin and Ivan Vagner and astronaut Don Pettit of U.S. space agency NASA landed on the Kazakh steppe near the city of Zhezkazgan at 6:20 a.m. (0120 GMT). Roscosmos said the parachute-assisted landing was a trouble-free descent.

—Space.com: “SpaceX CRS-32 Dragon Cargo Capsule Arrives at the ISS with 6,700 Pounds of Supplies“

A SpaceX Dragon cargo capsule has arrived at the International Space Station (ISS) this morning (April 22), wrapping up about 28 hours traveling on orbit to close the gap between them. Elon Musk’s company launched its 32nd robotic resupply mission to the ISS for NASA early Monday morning (April 21), sending a Dragon freighter aloft from Florida’s Space Coast.

—Gizmodo: “The ISS Is in the ‘Riskiest Period of Its Existence,’ NASA Safety Panel Warns“

During a meeting of the Aerospace Safety Advisory Panel (ASAP) held on Thursday, members of a NASA safety panel stated that there are growing risks threatening the space station as it nears the end of its use, SpaceNews reported. “The ISS has entered the riskiest period of its existence,” Rich Williams, a member of the panel, said during the meeting. At the top of the list of growing risks is a leak where air has been escaping at an increasing rate from a tunnel that connects a docking port to a Russian module.

Podcast: The Curious Universe

Posted on by onespaceman2000

If you are looking for new podcast material, you may want to check out NASA’s Curious Universe podcast. It has been around for a while, but it is starting a new series celebrating Earth from April 15 to May 13.

The first episode in the new Earth series is titled “How NASA Sees Our Blue Marble.” In the episode, we hear from Karen St. Germain, the director of NASA’s Earth Science Division. It is a chance to learn about the planet that NASA spends the most time studying.

If you like this series, you can go back and listen to other episodes, such as:

-“Inside the Team That Keeps Hubble Flying” (March 14, 2025)
-“The Sun Series” (March 19 to May 3, 2024)
-“Defending the Planet from Asteroids” (February 21, 2023)
-“The Search For Life: Are We Alone?” (June 21, 2022)

Pic of the Week: The Starburst Galaxy

Posted on by onespaceman2000
Image (Credit): Starburst Galaxy Messier 94. (ESA/Hubble and NASA)

This week’s image is from the Hubble Space Telescope. It was shared on NASA’s Astronomy Picture of the Week website last month. The sparkling galaxy, Messier 94, is about 15 million light-years away.

Here is NASA’s description of what you are seeing above:

Beautiful island universe Messier 94 lies a mere 15 million light-years distant in the northern constellation of the hunting dogs, Canes Venatici. A popular target for earth-based astronomers, the face-on spiral galaxy is about 30,000 light-years across, with spiral arms sweeping through the outskirts of its broad disk. But this Hubble Space Telescope field of view spans about 7,000 light-years or so across M94’s central region. The sharp close-up examines the galaxy’s compact, bright nucleus and prominent inner dust lanes, surrounded by a remarkable bluish ring of young, massive stars. The massive stars in the ring appear to be less than about 10 million years old, indicating the galaxy experienced a corresponding well-defined era of rapid star formation. As a result, while the small, bright nucleus is typical of the Seyfert class of active galaxies, M94 is also known as a starburst galaxy. Because M94 is relatively nearby, astronomers can explore in detail reasons for the galaxy’s burst of star formation.

Note: I swapped out the earlier protostar image for this one when I realized I was duplicating an earlier entry.

Space Stories: Even More Space Tourists, Upcoming Asteroid Encounter, and Copernicus Had Help

Posted on by onespaceman2000
Image (Credit): New Shepard’s NS-31 Mission crew. (Blue Origin)

Here are some recent stories of interest.

—ABC News: “Blue Origin Mission with All-female Crew, Including Katy Perry, Completes Space Trip“

Blue Origin’s all-female crew, which included pop star Katy Perry, completed their trip into space Monday morning. The flight lasted around 11 minutes and traveled more than 60 miles above Earth, according to Blue Origin, passing the Kármán line, which at 62 miles above sea level is considered to be the boundary between Earth’s atmosphere and outer space. Along with Perry, the crew included Blue Origin owner Jeff Bezos’ journalist fiancée, Lauren Sanchez, who is also a helicopter pilot.

—NASA: “NASA’s Lucy Spacecraft Prepares Second Asteroid Encounter“

NASA’s Lucy spacecraft is 6 days and less than 50 million miles (80 million km) away from its second close encounter with an asteroid; this time, the small main belt asteroid Donaldjohanson. This upcoming event represents a comprehensive “dress rehearsal” for Lucy’s main mission over the next decade: the exploration of multiple Trojan asteroids that share Jupiter’s orbit around the Sun.

—University of Sharjah: “Copernicus May Have Leaned on Ancient Muslim Astronomer in Developing his Cosmological System“

New research has revealed that the cosmological model developed by Nicolaus Copernicus, the renowned European Renaissance polymath, bears striking resemblance to the one designed by an Arab Muslim astronomer nearly two centuries earlier. The research conducted at the University of Sharjah is a comparative and analytical study which examines in parallel the writings of Copernicus in correlation with the works of the 14th century Muslim astronomer Ibn al-Shatir.