Top Astronomy Stories in 2023

Posted on by onespaceman2000
Image (Credit): Chart showing the planned travel of the JUICE spacecraft. (ESA, work performed by ATG under contract to ESA)

I wanted to start out the new year by first remembering all of the great missions from 2023. I also decided to group this work rather than focus on single missions.

Here is what I came up with:

NASA’s Moon Mission: We saw more progress towards the next steps in the Artemis program to put humans on the Moon, including NASA’s announcement of the four astronauts to lead the Artemis II mission, SpaceX’s tests of the Starship rocket, and the design of new spacesuits for the Artemis astronauts.

Other Attempts to Land on the Moon: We saw other nations also reaching for the Moon. While India had great success landing a rover on the lunar South Pole, both Russia and a commercial venture from Japan did not have similar luck. We also saw Japan trying it again late last year.

NASA Asteroid Missions: Asteroids were the big news this year, with Lucy encountering a surprise pair of asteroids, OSIRIS-REx bringing back a sample from the asteroid Bennu, and NASA launching the Psyche mission.

JWST Discoveries: This year we celebrated the anniversary of the James Webb Space Telescope (JWST), which has been better than ever imaged. It is helping to change our understanding of the origin of the universe while poking and prodding at exoplanets to review their secrets.

ESA Missions: The European Space Agency (ESA) has also been very busy in 2023. For instance, the launch of the Euclid mission to study dark matter and dark energy, as well as the JUICE mission to study Jupiter and its moons, will assist with our understanding of the big picture as well as our own neighborhood.

That’s an impressive record, and I look forward to even more great news in 2024.

A Day in Astronomy: Pioneer 10 Approaches Jupiter

Posted on by onespaceman2000
Image (Credit): Artist’s rendering of the Pioneer 10 spacecraft. (Don Davis for NASA)

We may have missed the date of the story in this piece (the anniversary was November 6), but this is an opportunity to share another site that brings astronomical history to life. The American Astronomical Society, which brings together professional astronomers, astronomy educators, and amateur astronomers, has its own blog on astronomical anniversaries that I wanted to highlight. It is called This Month in Astronomical History.

The November article is about the 50th anniversary of NASA’s Pioneer 10 mission as it came in contact with Jupiter. The article notes that the spacecraft first started imaging Jupiter on November 6, 1973 when it was still 16 million miles away from the planet. Overall, it sent back about 500 images of Jupiter and its moons.

You can read the article itself for information on the success of the mission. The author also noted the fate of the spacecraft:

Originally slated for 21 months of operation — sufficient to complete the Jupiter observations — its official science mission was ended on 31 March 1997. Its last signal was sent on 23 January 2003; from a distance of about 12.2 billion km (7.6 billion miles) from home, Pioneer’s swansong took over 11 hours to reach us.

The spacecraft was still communicating with us about 50 years after its Jupiter mission. That is impressive.

Space Stories: Name-dropping on Europa, Flying Toolboxes, and Space Veggies

Posted on by onespaceman2000
Image (Credit): NASA’s Europa Clipper. (NASA)

Here are some recent stories of interest.

—NASA JPL: “Time is Running Out to Add Your Name to NASA’s Europa Clipper“

Six weeks remain for you to add your name to a microchip that will ride aboard the spacecraft as it explores Jupiter’s moon Europa. It’s not every day that members of the public have the chance to send their names into deep space beyond Mars, all the way to Jupiter and its moon Europa. But with NASA’s Europa Clipper, you have that opportunity: Names will ride aboard the spacecraft as it journeys 1.8 billion miles (2.6 billion kilometers) to this icy moon, where an ocean hides beneath a frozen outer shell. The deadline to join the mission’s “Message in a Bottle” campaign is only six weeks away. The campaign closes at 11:59 p.m. EST, Dec. 31, 2023.

—NBC News: “Look! Up in the sky! It’s a bird! It’s a plane! It’s … a tool bag?“

That’s no moon. An astronaut’s tool bag that accidentally floated away during a routine spacewalk at the International Space Station is now orbiting Earth and may be bright enough to spot by keen-eyed skywatchers. The bag drifted away from the space station this month when NASA astronauts Jasmin Moghbeli and Loral O’Hara were performing maintenance on the exterior of the orbiting outpost.

—LiveScience: “China Successfully Grows Lettuce and Tomatoes Aboard Tiangong Space Station“

China’s Shenzhou 16 astronauts have been growing vegetables aboard the Tiangong space station, as part of plans for future deep space exploration. Mission commander Jing Haipeng and rookie astros Zhu Yangzhu and Gui Haichao have been aboard Tiangong since late May and are due to return to Earth on Oct. 31, after handing over control of the station to the newly arrived Shenzhou 17 mission crew. Jing and company have spent time cultivating veggies using two sets of specialized equipment. The first started operation in June and has reaped four batches of lettuce. The second one was put into operation in August for growing cherry tomatoes and green onions.

Space Stories: Curiosity Continues, Exoplanets with Dinosaurs, and Nasty Jupiters

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Image (Credit): Curiosity’s view of the Martian surface. (NASA)

Here are some recent stories of interest.

—NASA JPL: “NASA’s Curiosity Rover Clocks 4,000 Days on Mars“

Four thousand Martian days after setting its wheels in Gale Crater on Aug. 5, 2012, NASA’s Curiosity rover remains busy conducting exciting science. The rover recently drilled its 39th sample then dropped the pulverized rock into its belly for detailed analysis. To study whether ancient Mars had the conditions to support microbial life, the rover has been gradually ascending the base of 3-mile-tall (5-kilometer-tall) Mount Sharp, whose layers formed in different periods of Martian history and offer a record of how the planet’s climate changed over time.

—Cornell University: “‘Jurassic Worlds’ Might be Easier to Spot than Modern Earth“

Things may not have ended well for dinosaurs on Earth, but Cornell University astronomers say the “light fingerprint” of the conditions that enabled them to emerge here provide a crucial missing piece in our search for signs of life on planets orbiting alien stars. Their analysis of the most recent 540 million years of Earth’s evolution, known as the Phanerozoic Eon, finds that telescopes could better detect potential chemical signatures of life in the atmosphere of an Earth-like exoplanet more closely resembling the age the dinosaurs inhabited than the one we know today.

—UC Riverside: “Giant Planets Cast a Deadly Pall“

Jupiter, by far the biggest planet in our solar system, plays an important protective role. Its enormous gravitational field deflects comets and asteroids that might otherwise hit Earth, helping create a stable environment for life. However, giant planets elsewhere in the universe do not necessarily protect life on their smaller, rocky planet neighbors. A new Astronomical Journal paper details how the pull of massive planets in a nearby star system are likely to toss their Earth-like neighbors out of the “habitable zone.” This zone is defined as the range of distances from a star that are warm enough for liquid water to exist on a planet’s surface, making life possible.

Look What Lucy Found

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Image (Credit): A view of the newly discovered second asteroid behind asteroid Dinkinesh. (NASA/Goddard/SwRI/Johns Hopkins APL/NOIRLab)

NASA’s Lucy spacecraft encountered a surprise last Wednesday as it approached the target asteroid Dinkinesh, located in the asteroid belt. Instead of finding a single asteroid, it found a binary pair. Early data indicated that asteroid Dinkinesh is about 0.5 miles wide and its orbiting partner is only 0.15 miles wide.

Lucy did not have time to stick around, but it captured enough images during its fly by to keep astronomers busy for some time. The spacecraft was flying about 10,000 mph as it passed the pair.

Lucy’s primary mission is the Trojan asteroids (that is, asteroids that share Jupiter’s orbit around the Sun). And why are they of interest? NASA mission page tells us:

Planet formation and evolution models suggest that the Trojan asteroids are likely to be remnants of the same primordial material that formed the outer planets (Jupiter, Saturn, Uranus, and Neptune), and thus serve as time capsules from the birth of our solar system over four billion years ago.

We may have many more surprises before Lucy finishes her 12-year mission.