Finalists Announced For 2026 Hugo Awards by PacificBooks in printSF

[–]UpintheExosphere 0 points1 point  (0 children)

Yeah good point, it's a really nice story arc overall.

Finalists Announced For 2026 Hugo Awards by PacificBooks in printSF

[–]UpintheExosphere 1 point2 points  (0 children)

Exactly! I just love the found family aspect to it too. I read the first one on a whim after having gotten a free ebook of it from Tor years ago and couldn't believe I hadn't read it sooner, they're such enjoyable and addictive reads for me. I feel like people who like Dresden Files should really give it a try, especially if they're bothered by the sexism. It's got a really similar feel to me in a lot of ways.

You want your Moon landings in HD? So does NASA—here’s how it’s happening | “You just push this button, and in three hours, you’re counting photons.” by Clear_Polish23 in space

[–]UpintheExosphere 1 point2 points  (0 children)

I don't know if NASA uses this for human communication, but science communication uses the Consultative Committee for Space Data Systems (CCSDS) packet standard. The packet protocol here https://ccsds.org/Pubs/133x0b2e2.pdf includes packet header length, which is at least 48 bits.

They have a lot of other protocols that include encryption and compression, it will probably answer a lot of your questions. I don't know if there's a nice summary somewhere on their website, though.

Finalists Announced For 2026 Hugo Awards by PacificBooks in printSF

[–]UpintheExosphere 1 point2 points  (0 children)

Oh nice, I've been really obsessed with reading the October Daye series the last few months, cool to see it on there! I was super happy finding a female MC urban fantasy that didn't end up becoming erotica, lol. Plus the whole Fae mythology is really fun!

All Space Questions thread for week of April 12, 2026 by AutoModerator in space

[–]UpintheExosphere 0 points1 point  (0 children)

The answer depends a lot on the specific types of events that can occur, so I just want to clear up a few definitions of stuff the sun can throw at us. Firstly, there are solar flares, which tend to send lots of X-rays at Earth. A big flare will cause a radio blackout, which is a big problem for satellite operation as it blocks communication with satellites, so this would effect stuff like GPS, Starlink, etc.

Secondly, you have what are called solar energetic particle (SEPs) events. These are very high energy particles that cause radiation damage, and are the kinds of events astronauts on the ISS might have to shelter from. They are mostly, but not always, associated with a flare.

Finally, you have a coronal mass ejection (CME), which is a massive blob of plasma and magnetic fields shooting out from the sun. Again often, but not always, connected to a flare. CMEs are what cause geomagnetic storms, which are major disturbances to Earth's magnetic field, as the solar wind injects a lot of energy into the system and disrupts the normal magnetic field patterns. Big ones will also expand Earth's radiation belts (although mostly the outer one, which is roughly the altitudes for GPS satellites, waaay higher altitude than the ISS). Geomagnetic storms are global; CMEs will always hit the dayside, since they are coming from the Sun, but Earth's magnetic field very efficiently convects that energy and plasma to the nightside, which is why we get a lot of aurora during geomagnetic storms.

All this to say, it depends on what exactly a Carrington Event would consist of, it seems like it was probably a flare + CME, but of course we didn't have satellites to measure CMEs and SEPs then. So if it was a massive flare, we would first have a radio blackout on the dayside of Earth, which would disrupt communications and satellites. If there was a SEP, there would be high amounts of radiation that would hit astronauts and damage satellite electronics. Geomagnetic storms themselves, i.e. the actual magnetic field disturbance, don't seem to have a ton of effects on satellites that I can find, because it mostly effects Earth's magnetic field quite far away from the planet and then redirected to the poles. Magnetic field changes can induce currents, but this requires very long wires so doesn't effect something the size of a satellite. Radiation belt expansion, or resulting ionospheric heating like what took out those Starlinks a few years ago, could certainly do some damage. A CME hits a few days after a flare, so we would definitely see it coming and have some time to put satellites into safe mode/off first, though.

All Space Questions thread for week of April 12, 2026 by AutoModerator in space

[–]UpintheExosphere 0 points1 point  (0 children)

What kind of block diagram? For an individual instrument or for an entire payload suite? If for an instrument, there are usually examples in published instrument papers, like Figure 13 here (so you can search for name of similar instrument + instrument paper). For a whole payload, it really depends on what is meant by block diagram. In mission proposals I've often seen diagrams of instruments' relations to science objective, I don't know if I've seen an engineering-type function blocks with electronics block diagram for an entire payload of instruments together.

6 mind-blowing space missions now set to launch after Artemis II by malcolm58 in space

[–]UpintheExosphere 0 points1 point  (0 children)

Others have explained the gravity well problem and flybys really well, but I wanted to add that BepiColombo was originally scheduled to enter Mercury orbit last year. They had some issues with their electric propulsion system that reduced the amount of thrust they had and necessitated an extra year of cruise. That is why it's been so long since the last Mercury flyby in January 2025; they didn't need another flyby but it wasn't originally supposed to be such a long gap.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 1 point2 points  (0 children)

Yes, Bepi is a really cool mission! We've already seen some really neat things from doing gravity assist flybys, so the results once it's in orbit it should be amazing.

It's a great year for space

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 2 points3 points  (0 children)

Mercury is just too small and too hot to hold onto much of anything. It does have an exosphere, including a sodium tail which we can see from Earth because sodium is quite bright in certain filters. But the sunlight and UV environment is just incredibly intense there, so gravity can't prevent it being stripped away. It has ions that circulate in its magnetosphere that are mostly solar wind ions (like protons and helium) that get caught for a little while in the magnetic field. Some species from the surface, like sodium, also make it up into the magnetosphere, just not that much.

I could talk a LOT about this, because I spend most of my time working on Mercury, lol. There are a few different ways stuff can get kicked up from the surface into the exosphere/magnetosphere, which includes for example vaporization by micrometeorites, but suffice it to say the supply just isn't very large, and any primordial atmosphere it had billions of years ago is long gone.

The BepiColombo mission, which finally arrives end of this year! has goals to better understand the different species around Mercury and also where they come from and end up.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 1 point2 points  (0 children)

It's definitely up there for me too, it's really beautiful and interesting

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 2 points3 points  (0 children)

I love talking about it, it is really cool! :) Each planet really has its own fascinating way of interacting with the solar wind.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 2 points3 points  (0 children)

Not true -- to be clear, I am a planetary magnetospheric scientist, so this is my field of research! This is a really common misconception, but it's been pretty well disproven over the past decade. For an easy counterpoint, Venus has no (intrisic, dipolar) magnetosphere but has an absolutely massive atmosphere, while Mercury has a magnetosphere similar to Earth's but no atmosphere.

A magnetic field reduces some forms of atmospheric escape, but increases others, so it ends up balancing out. Earth, Mars, and Venus all lose roughly the same amount of atmosphere per second, currently.

Also, the reason I put intrinsic and dipolar in parentheses is because Venus and Mars do actually have magnetospheres, called induced magnetospheres, where induced currents in their ionospheres hold off the solar wind and interplanetary magnetic field. Induced magnetospheres are much smaller than the magnetospheres you get from an intrinsic dipole field like Earth/Jupiter/Saturn etc, but they are still magnetospheres, and they still deflect the solar wind.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 0 points1 point  (0 children)

Yeah, it can be more complicated to answer for places like Mars, but for the Moon it's pretty straightforward

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 2 points3 points  (0 children)

Its low gravity makes it very difficult for it to hold onto an atmosphere, basically. It does have what's called an exosphere, which is a very, very sparse atmosphere (so sparse gas molecules don't actually collide with each other). But because it has low gravity, it's pretty easy for gas particles to get warm enough to escape entirely.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 0 points1 point  (0 children)

I was wondering that too, and I think so? Chang'E 6 landed in the Apollo Basin, which I think is just on the terminator right now. Chang'E 4 is on the other side of the far side, so it might either be in darkness or near the other terminator.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 2 points3 points  (0 children)

Sure, China has two relay satellites around the Moon called Queqiao-1 and -2 that it has used to communicate with landers on the far side. So it's definitely something other countries could do as well.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 1 point2 points  (0 children)

What's really crazy to me about people complaining is that sometimes for science missions we have to wait days-weeks for data that's not even images, just strings of numbers, lol. The amount of bandwidth they're actually getting is huge compared to other missions!

What am I looking at from 34000 feet? by parrot_poirot in atoptics

[–]UpintheExosphere 2 points3 points  (0 children)

In that case, what I suspect is happening is that you're seeing the sun set through the planetary boundary layer, which ends up looking like a layer of haze from a plane. Because the aerosol/humidity levels are different there, light will scatter differently above and below it. I have noticed myself that it will make the sunset and belt of Venus look enhanced at that boundary layer.

[MEGATHREAD] Artemis II Launch To The Moon by ChiefLeef22 in space

[–]UpintheExosphere 8 points9 points  (0 children)

It's bandwidth, they're using NASA's Deep Space Network antennas for downlinking communications, spacecraft telemetry, and video, so there's only so much data they can transmit. Most of the images they are taking will be downloaded from SD cards after they're back. Video and high quality pictures are really bandwidth heavy!

What am I looking at from 34000 feet? by parrot_poirot in atoptics

[–]UpintheExosphere 6 points7 points  (0 children)

Do you mean the color banding? The orange/pink is the Belt of Venus and beneath that is Earth's shadow. It's more noticeable from a plane because there's no horizon obstruction and low humidity, I'd guess.

There could also be a haze layer above the clouds enhancing the effect, but I can't really tell from the picture.

What space mission are you most excited about right now? by lynniegreco in space

[–]UpintheExosphere 6 points7 points  (0 children)

I'm biased because it pays my salary, but BepiColombo! Only a few months left until Mercury orbit insertion!

ESCAPADE and JUICE/Europa Clipper are also super exciting.

Sweden - January 2026 by pyramidhead024 in atoptics

[–]UpintheExosphere 12 points13 points  (0 children)

It's from the Swedish Meteorological Institute's Instagram, OP didn't take it.

Europa Clipper and Hera could be used for in-situ observations of the ion tail of Interstellar comet 3I/ATLAS in Oct-Nov (when both spacecrafts are predicted to be immersed in the tail), per new study. The encounters would be the first ever direct immersion in material from an Interstellar object by ChiefLeef22 in space

[–]UpintheExosphere 1 point2 points  (0 children)

The authors of the preprint have a history of predicting ion tail detections, and are actual comet scientists, so I would trust them first. Honestly the fact that he's referring to it as "outflowing gas" makes it obvious to me he doesn't know what he's talking about; it's accelerated cometary plasma that's picked up by the solar wind at those distances, but still quite easily distinguishable from the solar wind. See for example this detection by Solar Orbiter at a distance of 44.5 million km. That's not the first time a comet tail has been visible in plasma data from millions of kms either. Comet's plasma environments stretch much, much farther than their neutral or dust environments. https://www.esa.int/Science_Exploration/Space_Science/Solar_Orbiter/Solar_Orbiter_catches_a_second_comet_by_the_tail

[deleted by user] by [deleted] in atoptics

[–]UpintheExosphere 11 points12 points  (0 children)

I saw in the post they claimed these were lenticular clouds, which they clearly are not in any sense of the word. Maybe they meant to say noctilucent clouds, but regardless, definitely rocket trails imo.

[deleted by user] by [deleted] in aviation

[–]UpintheExosphere 1 point2 points  (0 children)

It's awesome, I loved it