Asteroid Sample Coming to Earth This Weekend

Posted on by onespaceman2000
Image (Credit): Asteroid Bennu as seen by the OSIRIS-REx as it begins its return to Earth back in May 2021. (NASA/Goddard/University of Arizona; Writer Daniel Stolte, University of Arizona)

This weekend will should see the safe landing of a asteroid sample from far away. On Sunday, NASA’s Origins, Spectral Interpretation, Resource Identification, Security, Regolith Explorer (OSIRIS-REx) spacecraft will return to Earth with sample material from asteroid Bennu, which it encountered two years ago.

Launched on Sept. 8, 2016, the spacecraft spent about two years getting to Bennu and then more than two years studying the asteroid and collecting a 250-gram sample that should be in the hands of NASA scientists shortly. The graphic below shows the return path of the sample as it heads for the Utah desert. You can also watch this NASA video for more information on the overall mission and keep abreast of mission highlights via this mission blog. NASA also has a recent podcast discussing the spacecraft’s adventures and trip back to Earth.

And what about OSIRIS-REx after it makes this deposit? It will become OSIRIS-APEX (APEX for “Apophis Explorer”) and go back into the inner solar system before encountering asteroid Apophis in 2029.

We talk about rocket reuse, but this is a terrific example of spacecraft reuse.

The timing could not be better as NASA awaits 2024 budget decisions from Congress and further discussions about another sample return, this one from Mars.

Credit: NASA

Pic of the Week: Shackleton Crater

Posted on by onespaceman2000
Image (Credit): Shackleton Crater on the lunar surface. (Mosaic created by LROC and ShadowCam teams with images provided by NASA/KARI/ASU)

This week’s image shows the Shackleton Crater located at the Moon’s South Pole. To create what you see above, an image from NASA’s Lunar Reconnaissance Orbiter Camera (LROC) was combined with another image from ShadowCam, a NASA instrument on board a KARI (Korea Aerospace Research Institute) spacecraft called Danuri,

Here is more information from NASA concerning the two cameras:

LROC can capture detailed images of the lunar surface but has limited ability to photograph shadowed parts of the Moon that never receive direct sunlight, known as permanently shadowed regions. ShadowCam is 200-times more light-sensitive than LROC and can operate successfully in these extremely low-light conditions, revealing features and terrain details that are not visible to LROC. ShadowCam relies on sunlight reflected off lunar geologic features or the Earth to capture images in the shadows.

ShadowCam’s light sensitivity, however, renders it unable to capture images of parts of the Moon that are directly illuminated, delivering saturated results. With each camera optimized for specific lighting conditions found near the lunar poles, analysts can combine images from both instruments to create a comprehensive visual map of the terrain and geologic features of both the brightest and darkest parts of the Moon. The permanently shadowed areas in this mosaic, such as the interior floor and walls of Shackleton Crater, are visible in such detail because of the imagery from ShadowCam. In contrast, the sunlit areas in this mosaic, like the rim and flanks of the crater, are a product of imagery collected by LROC.

Space Quote: Venezuela Aims for the Moon

Posted on by onespaceman2000
Image (Credit): Artist’s concept of a Chinese Moon base. (South China Morning Post)

“…scientific, technological, industrial and aerospace cooperation will sooner rather than later (send) the first Venezuelan man and woman to the moon in a Chinese spacecraft.”

–Statement by Venezuelan President Nicolas Maduro in reference to an agreement with China that would train Venezuelan astronauts in China in preparation for a future Moon mission. China has previously stated its plans to land humans on the lunar surface by 2030 and establish a Moon base in the 2030s. Other countries have already signed agreements with China related to the lunar base, including Russia, Pakistan, and the United Arab Emirates.

Study Findings: Constraining Cosmological Parameters Using the Cluster Mass–Richness Relation

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If you don’t understand the research title, you are not alone. The abstract is even worse:

The cluster mass–richness relation (MRR) is an observationally efficient and potentially powerful cosmological tool for constraining the matter density Ωm and the amplitude of fluctuations σ8 using the cluster abundance technique. We derive the MRR relation using GalWCat19, a publicly available galaxy cluster catalog we created from the Sloan Digital Sky Survey-DR13 spectroscopic data set. In the MRR, cluster mass scales with richness as $\mathrm{log}{M}_{200}=\alpha +\beta \mathrm{log}{N}_{200}$. We find that the MRR we derive is consistent with both the IllustrisTNG and mini-Uchuu cosmological numerical simulations, with a slope of β ≈ 1. We use the MRR we derived to estimate cluster masses from the GalWCat19 catalog, which we then use to set constraints on Ωm and σ8. Utilizing the all-member MRR, we obtain constraints of Ωm = ${0.31}_{-0.03}^{+0.04}$ and σ8 = ${0.82}_{-0.04}^{+0.05}$, and utilizing the red member MRR only, we obtain Ωm = ${0.31}_{-0.03}^{+0.04}$ and σ8 = ${0.81}_{-0.04}^{+0.05}$. Our constraints on Ωm and σ8 are consistent and very competitive with the Planck 2018 results.

Where is Carl Sagan when you need him? I know these are scientific journals, but plain language abstracts should be possible.

Luckily, the university released a press release on the study findings. Here is the bottom line:

A UC Merced researcher and her teammates around the world have succeeded in measuring the total amount of matter in the universe for the second time. A new paper in the Astrophysical Journal, titled “Constraining Cosmological Parameters using the Cluster Mass-Richness Relation,” shows that matter makes up 31% of the universe, with the remainder consisting of dark energy — answering one of the most interesting and important questions in cosmology.

Now that wasn’t too hard. If you want to read the paper itself, you can find the details here.

Good luck.

Space Stories: New Lunar Water Estimates, Coronal Mass Ejection, and Oxygen on Mars

Posted on by onespaceman2000
Image (Credit): Shadows on the Moon’s south pole. (NASA)

Here are some recent stories of interest.

—Southwest Research Institute: “New Findings Suggest Moon May Have Less Water Than Previously Thought“

A team recently calculated that most of the Moon’s permanently shadowed regions (PSRs) are at most around 3.4 billion years old and can contain relatively young deposits of water ice. Water resources are considered key for sustainable exploration of the Moon and beyond, but these findings suggest that current estimates for cold-trapped ices are too high.

—Scientific American: “Massive Sun Outburst Smacks NASA Spacecraft“

NASA’s Parker Solar Probe was built to withstand the ravages of the environment near our sun—and with good reason. The car-size spacecraft has now flown through a giant solar outburst of charged particles called a coronal mass ejection (CME). If that CME had it hit Earth instead, it may have caused vast, continent-wide blackouts, scientists say. Some of those searing particles whipped through space at about three million miles per hour.

—BGR: “NASA Successfully Generated Oxygen on Mars“

NASA’s Perseverance rover has done the unthinkable. Or, at least, a small device on the rover has. According to a tweet and article shared by NASA’s Perseverance team on Twitter, a device known only as MOXIE has proven that we can generate oxygen on Mars using the planet’s CO2-concentrated atmosphere. This tech is a huge boon, and the success of this story could help pave the way for future oxygen generation on the Red Planet, something that would make long-term exploration of the planet far more feasible.