Keldura Daily Open Keldura

Keldura Daily · Cheatsheets

Science & Space cheatsheets.

Every Science & Space cheatsheet Keldura Daily has published, newest first. Each cheatsheet is compiled by Keldura's AI from the sources it cites.

Cheatsheet your own link — free
Latest cheatsheets

Science & Space · 6 cheatsheets this week

Read in Briefings

Science & Space

AST SpaceMobile commits $1.3 billion to engines for Blacklift

AST SpaceMobile wants its own rocket to launch phone-service satellites, but can Blacklift meet its 2028 target?

Cheatsheet for AST SpaceMobile commits $1.3 billion to engines for Blacklift. Text equivalent is attached.

Why it matters: BlueBird satellites are designed to deliver internet service directly to cell phones, so AST SpaceMobile's ability to put them in orbit affects deployment of that service. Blacklift would give the co…

Open original (3 sources): devdiscourse.com, spaceflightnow.com, Space.com

Open cheatsheet → Post to X

What happened
AST SpaceMobile announced Blacklift and a $1.3 billion agreement with Firefly Aerospace covering engine licensing, engines and engineering support. [4][8]
Background
AST SpaceMobile's BlueBird satellites provide internet service directly to cell phones; the company wants Blacklift to launch those satellites rather than depend entirely on outside rocket providers. [2][8]
Why
The proposed rocket would carry five BlueBird satellites per flight, giving AST SpaceMobile dedicated capacity to expand its constellation. [4]
Who pays
AST SpaceMobile will provide $800 million upfront in equal parts cash and stock, plus $250 million for engines and $250 million for engineering services. [4]
What's next
The announced first-flight target is 2028; Firefly's initial engine package covers the first three rockets. [4][8]

Science & Space

Astronauts complete the space station’s eight-array power upgrade

The space station has finished adding new solar arrays, but how long must the extra electricity keep its aging systems running?

Cheatsheet for Astronauts complete the space station’s eight-array power upgrade. Text equivalent is attached.

Why it matters: The additional electricity supports station operations as the original solar arrays lose output after exceeding their 15-year design life. The new arrays are intended to help keep the station operati…

Open original (3 sources): NASA News, Space.com, cbc.ca

Open cheatsheet → Post to X

What happened
Menon and Kutryk installed and deployed the eighth and final roll-out array during a six-hour, 59-minute spacewalk on November 5. [3][6]
Why
The original solar arrays began losing output after exceeding their 15-year design life. [4]
The catch
This is an extension of an aging station’s capabilities, with retirement and controlled deorbit currently scheduled for late 2030. [4]
What's next
The new arrays are intended to support station operations through the planned late-2030 retirement and deorbit. [4]

Science & Space

Hera returns its first close-up of the Didymos asteroids

Hera can now inspect the asteroids altered by NASA’s DART impact, but what did the collision change beyond the smaller body’s orbit?

Cheatsheet for Hera returns its first close-up of the Didymos asteroids. Text equivalent is attached.

Why it matters: DART demonstrated that a spacecraft impact could change an asteroid’s orbit; Hera is investigating the result so that the technique can become better understood and potentially repeatable if Earth ev…

Open original · ESA News

Open cheatsheet → Post to X

What happened
Hera obtained its first close-up of the asteroid pair from 60 kilometers away, revealing a different side of Didymos from DART’s approach images. [7]
Background
Dimorphos orbits Didymos; NASA deliberately struck the smaller body with DART on September 26, 2022, to test asteroid deflection. [7]
Why
The impact shortened Dimorphos’s orbit by 33 minutes, give or minus one minute, making it the first Solar System object whose orbit humans measurably changed. [7]
The catch
ESA scientists expect debris to have crossed the roughly one-kilometer gap, but must determine which observed features came from that transport. [7]
What's next
Hera will conduct a close-up investigation and map changes across both bodies to help explain DART’s effects. [7]

Science & Space

Swift reenters Earth’s atmosphere after an unsuccessful rescue

A robot was sent to extend Swift’s life, but why did the rescuer return to Earth before the telescope?

Cheatsheet for Swift reenters Earth’s atmosphere after an unsuccessful rescue. Text equivalent is attached.

Why it matters: Astronomers have lost an observatory that studied gamma-ray bursts for roughly 11 times its original two-year mission. Its attempted rescue also illustrates a practical constraint on extending satell…

Open original (3 sources): theconversation.com, Space.com, apnews.com

Open cheatsheet → Post to X

What happened
Swift reentered over northern Sumatra on November 4 after 22 years in orbit. [6][9]
Background
Launched in November 2004 for a two-year mission, Swift studied gamma-ray bursts, exceptionally powerful cosmic explosions. [6]
Why
Its orbit became low enough that atmospheric drag disrupted the steady pointing its telescopes required. [4]
The catch
The rescue spacecraft LINK never captured Swift and reentered in September, before the observatory it was meant to save. [4]

Science & Space

ISS crew prepares final array installation for power upgrade

The ISS is preparing its final roll-out solar array, but what must astronauts complete before the power upgrade is finished?

Cheatsheet for ISS crew prepares final array installation for power upgrade. Text equivalent is attached.

Why it matters: The completed upgrade would give the station about 55 additional kilowatts of generating capacity, roughly 34% above its previous 160-kilowatt level. The work supports a station where crews are simul…

Open original · NASA News

Open cheatsheet → Post to X

What happened
Kutryk and Menon prepared tools and procedures on November 3 for the final solar-array installation spacewalk. [3]
Why
The upgrade is designed to raise station generating capacity from 160 to about 215 kilowatts—an increase of roughly 34%. [3]
The catch
Completion requires a planned seven-hour spacewalk to install the eighth array on the starboard truss. [3]
What's next
The spacewalk is scheduled for 8:30 a.m. EST on November 5, with NASA+ coverage beginning at 7 a.m. [3]

Science & Space

ESA advances three candidates for its next Earth Explorer

Three missions could expose different gaps in Earth's climate system, but which can turn its scientific promise into a workable satellite?

Cheatsheet for ESA advances three candidates for its next Earth Explorer. Text equivalent is attached.

Why it matters: The choice will determine which measurement gap this mission addresses: Earth's energy imbalance, the upper atmosphere or conditions inside polar ice sheets. Each targets a different limitation in un…

Open original · ESA News

Open cheatsheet → Post to X

What happened
ESA narrowed four Earth Explorer 12 concepts to ECO, Keystone and CryoRad. [5]
Why
The candidates address gaps in planetary energy accounting, upper-atmosphere observations and polar ice-sheet measurements. [5]
The catch
Advancement is not approval to fly: one mission will be selected, and ESA describes ECO as extremely challenging. [5]
What's next
ESA plans to choose one candidate before its next Council at Ministerial level; the selected mission is expected to launch around 2036. [5]

Science & Space

NASA seeks commercial options to extend Hubble’s working life

NASA wants to keep Hubble doing science, but can commercial servicing beat its declining orbit?

Cheatsheet for NASA seeks commercial options to extend Hubble’s working life. Text equivalent is attached.

Why it matters: Hubble cannot maintain its own orbit because it has no propulsion system; extending its scientific life therefore requires an outside intervention rather than an adjustment by the telescope itself.

Open original · NASA News

Open cheatsheet → Post to X

What happened
NASA requested commercial input on boosting, servicing or disposing of Hubble. [3]
Why
Atmospheric drag lowers Hubble’s altitude, and the telescope cannot propel itself back up. [3]
The catch
NASA anticipates that a mission would need to take place by 2032; the request does not establish a chosen solution. [3]
What's next
Industry responses are due by 3 p.m. EST on November 30. [3]

Science & Space

Astronauts install a working solar array on the space station

A new array is generating power on the space station, but one more installation remains before the upgrade is complete.

Cheatsheet for Astronauts install a working solar array on the space station. Text equivalent is attached.

Why it matters: The completed upgrade would add about 55 kilowatts, roughly 34% above the stated 160-kilowatt capacity, to an orbital laboratory conducting plant, exercise and materials research.

Open original · NASA News

Open cheatsheet → Post to X

What happened
Menon and Kutryk installed a port-side roll-out solar array that is now producing electricity. [5]
Why
The array program augments the station’s power-generation system. [5]
The catch
The full increase from 160 to about 215 kilowatts depends on completing the upgrade, not just this installation. [5]
What's next
The astronauts are scheduled to install the eighth and final array on the starboard truss on November 5. [5]

Science & Space

Astronauts deploy another solar array to bolster ISS power

New panels help power the ISS, but how much can they offset the decline of arrays already beyond their design life?

Cheatsheet for Astronauts deploy another solar array to bolster ISS power. Text equivalent is attached.

Why it matters: The station's eight original arrays have exceeded their 15-year design life and are producing less power. Operating the roll-out arrays alongside the older panels has increased the station's power su…

Open original (2 sources): Space.com, nasa.gov

Open cheatsheet → Post to X

What happened
Menon and Kutryk installed and deployed another roll-out solar array in a seven-hour, 11-minute spacewalk. [2]
Why
The eight original arrays have exceeded their 15-year design life and their power output has degraded. [2]
The catch
New and old arrays work together; the reported 20%–30% power increase is not attributed to this installation alone. [2]
What we don't know
The supplied account does not quantify the power added by this individual array. [2]

Science & Space

Hera distinguishes its two asteroid targets for the first time

Hera can now distinguish its asteroid targets, but what did humanity’s impact actually do to the smaller one?

Cheatsheet for Hera distinguishes its two asteroid targets for the first time. Text equivalent is attached.

Why it matters: Dimorphos is the first Solar System object whose orbit was measurably shifted by human action, but scientists still need its mass, structure and impact damage to explain the deflection and make kinet…

Open original · ESA News

Open cheatsheet → Post to X

What happened
Hera separated the previously unresolved asteroid pair in an image taken from 1,280 kilometers away. [7]
Why
The mission will investigate the properties and impact damage that explain Dimorphos’s altered orbit. [7]
The catch
Dimorphos is only about one pixel across in this first image, so its surface remains unresolved. [7]
What's next
ESA identifies November 25 as the date for the first detailed images of Dimorphos. [7]

Science & Space

Lumina models the early universe at a much larger scale

Lumina gives astronomers a larger simulated universe, but will its predictions match what telescopes see?

Cheatsheet for Lumina models the early universe at a much larger scale. Text equivalent is attached.

Why it matters: Astronomers can compare Lumina’s predictions with telescope observations to test whether existing theories explain early galaxies and the gas between them; the simulation is a testing ground, not evi…

Open original (2 sources): si.edu, news.mit.edu

Open cheatsheet → Post to X

What happened
Researchers developed Lumina to simulate the first 2 billion years of cosmic evolution. [2][4]
Why
The model links dark matter, gas, stars and radiation so astronomers can examine how early galaxies changed their surroundings. [2][4]
The catch
Its predictions still need comparison with telescope observations to establish how well the modeled universe matches the real one. [2]

Science & Space

NASA changes lunar landing plans to target a 2028 return

NASA is giving two landers different routes to the Moon, but which will be ready to carry astronauts in 2028?

Cheatsheet for NASA changes lunar landing plans to target a 2028 return. Text equivalent is attached.

Why it matters: NASA is building an alternative path to the lunar surface if either SpaceX or Blue Origin encounters technical or supply-chain delays, rather than making the first landing depend on one provider’s sc…

Open original (4 sources): NASA News, cbsnews.com, NASA News, apnews.com

Open cheatsheet → Post to X

What happened
NASA revised both commercial lander concepts of operations and their lunar rendezvous arrangements. [5]
Why
Two development paths are intended to preserve a 2028 landing opportunity if one provider encounters significant delays. [8]
The catch
Neither company has been selected for the first crewed landing; NASA says readiness will decide. [5]
What's next
Watch the planned 2027 Artemis III mission: four astronauts are to test rendezvous and docking in Earth orbit. [8][9]

That's the desk. Every cheatsheet here started as a link. Yours can too.

Cheatsheet your own link — free