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ISS food comes in three forms: natural form, rehydratable, and thermostabilized. Half of the food is provided by NASA* and the other half by Russia.Natural Form (NF) refers to food that does not need to be processedExamples: Crackers, tortillas, nuts, granola bars, condiments, candy, and cookies.Rehydratable (R) foods have had the water removed from them. Once the crew are ready to eat, hot water is injected into the pouch to restore the food to its normal form.Examples: Cottage cheese, shrimp cocktail, scrambled eggs, noodles, mashed potatoes, quiche, borsch, milk, rice, macaroni & cheese, sausage patties, teriyaki vegetables, spaghetti with meat sauce, and grits.Thermostabilized (T) foods are heated to a level sufficient to kill harmful microorganisms and enzymes and then packaged in cans, cups, or pouches.Examples: Chopped pork with eggs, beef with vegetables, split pea soup, pike perch in Baltika sauce, tofu with Hoisin sauce, minestrone soup, grilled pork chop, tomato basil soup, chicken in white sauce, African sweet potato and peanut soup, and lasagna.There are also occasionally fresh foods, such as apples, oranges, and tomatoes. There is not a food refrigerator onboard, so these items are only available immediately after the arrival of a visiting vehicle.*ESA/JAXA provide speciality foods to NASA if one of their astronauts is to fly.

ISS food comes in three forms: natural form, rehydratable, and thermostabilized. Half of the food is provided by NASA* and the other half by Russia.Example US FoodsExample Russian FoodsNatural Form (NF) refers to food that does not need to be processedExamples: Crackers, tortillas, nuts, granola bars, condiments, candy, and cookies.Rehydratable (R) foods have had the water removed from them. Once the crew are ready to eat, hot water is injected into the pouch to restore the food to its normal form.Examples: Cottage cheese, shrimp cocktail, scrambled eggs, noodles, mashed potatoes, quiche, borsch, milk, rice, macaroni & cheese, sausage patties, teriyaki vegetables, spaghetti with meat sauce, and grits.Thermostabilized (T) foods are heated to a level sufficient to kill harmful microorganisms and enzymes and then packaged in cans, cups, or pouches.Examples: Chopped pork with eggs, beef with vegetables, split pea soup, pike perch in Baltika sauce, tofu with Hoisin sauce, minestrone soup, grilled pork chop, tomato basil soup, chicken in white sauce, African sweet potato and peanut soup, and lasagna.Also, as you might notice from the top picture, there are occasionally fresh foods, such as apples, oranges, and tomatoes. There is not a food refrigerator onboard, so these items are only available immediately after the arrival of a visiting vehicle.Regular bread is not part of the normal menu aboard ISS, largely because it takes up a lot of space and produces crumbs that would float around. There are flat breads. Tortillas are especially popular for the NASA astronauts, since they live in Texas. Here's a picture of a crew member making a breakfast taco using a tortilla, rehydrated scrambled eggs and hot sauce. Hot sauce is quite popular because in weightlessness, fluids rise into the head and can cause congestion that dulls the sense of taste, much like a head cold does here on Earth.Peanut butter in tortillas is also quite popular (it also happens to be one of my favorite weekday breakfasts).The table in the Russian Service Module has a built in can warmer.On the US segment, there is a food warmer that looks like a small suitcase.And some foods are warmed simply by using hot water.*ESA/JAXA provide speciality foods to NASA if one of their astronauts is to fly.

You can’t.Cantor proved that all ordinals can be represented in Cantor Normal Form[1] . It says that every ordinal [math]\alpha[/math] can be written, in only one way, as[math]\displaystyle \alpha = \omega^{\beta_1}n_1+\omega^{\beta_2}n_2+\ldots+\omega^{\beta_m}n_m[/math]where [math]m[/math] is a positive integer, [math]n_1,n_2,\ldots,n_m[/math] are positive integers, and [math]\beta_1 > \beta_2 > \ldots > \beta_m \ge 0[/math] are ordinals.This seems very promising, and it is, indeed, fundamentally important. But it may not be as promising as you think: notice that nothing here says that the [math]\beta_i[/math] need to be different from [math]\alpha[/math] itself. For example, you mentioned [math]\epsilon_0[/math]: the Cantor Normal Form of [math]\epsilon_0[/math] is[math]\epsilon_0 = \omega^{\epsilon_0}[/math]Similarly, the Cantor Normal Form of the first uncountable ordinal [math]\omega_1[/math] is simply[math]\omega_1 = \omega^{\omega_1}[/math]which isn’t very enlightening. In fact, there’s a whole series of ordinals called epsilon numbers, and they all satisfy [math]\epsilon = \omega^\epsilon[/math]. The ordinal [math]\omega_1[/math] is simply the [math]\omega_1^\text{th}[/math] epsilon number:[math]\omega_1 = \epsilon_{\omega_1}[/math].Once again, true, but not very illuminating.There’s no “constructive” expression involving [math]\omega[/math]'s which yields [math]\omega_1[/math].Footnotes[1] Ordinal arithmetic - Wikipedia