Saltar navegación

Activa JavaScript para disfrutar de los vídeos de la Mediateca.

Destination Tomorrow - DT17 - Future Space Food Concerns

Ajuste de pantalla

El ajuste de pantalla se aprecia al ver el vídeo en pantalla completa. Elige la presentación que más te guste:

Subido el 28 de mayo de 2007 por EducaMadrid

756 visualizaciones

First segment of episode 17 that describes the problems with long duration space travel such as bone loss, food stability, food nutrition and the need for astronauts to have alternative food sources once they reach their destination. The Future Space Food Concerns segment ends with a Did You Know? segment about astronaut ice cream.

Más información Transcripción

Descargar la transcripción

Hello, everyone. I'm Kara O'Brien and welcome to Part 2 of this special edition of Destination Tomorrow. 00:00:00
In Part 1, we found out how NASA researchers have made improvements in the types of foods astronauts have eaten 00:00:06
since the beginning of the space program up till today. 00:00:12
On this program, we will be discussing future food technologies and how they'll be used on long-duration missions. 00:00:15
Recently, it was announced that NASA is planning to send a crewed mission back to the Moon and to Mars. 00:00:21
Obviously, huge technological challenges will need to be overcome before these missions can be successfully accomplished. 00:00:27
NASA researchers realize that trips like these will require building the appropriate type of spacecraft, 00:00:34
having flawless life support systems, and will need the right tools to perform work once we arrive on these distant worlds. 00:00:39
But a major concern that often gets overlooked by the general public is what types of food will be eaten by our astronauts on these long missions. 00:00:46
Fortunately, previous missions to low-Earth orbit in the space shuttle and longer missions aboard the International Space Station 00:00:54
have helped NASA better understand how food and the astronaut interact. 00:01:01
But not much is known about how food will fare on these long missions. 00:01:05
The primary goal of the food systems in these long missions will be to provide a palatable, nutritious, and safe food for our explorers, 00:01:09
while also taking up as little room as possible. 00:01:16
Food is vital for survival here on Earth, but is even more important in some respects in space. 00:01:20
Its preparation, quantity, and quality are critical and can affect astronauts on a physiological level. 00:01:25
One of the most crucial problems on long missions is bone loss. 00:01:32
Typically, astronauts lose 1 to 2 percent of bone mass each month that they are in space, especially in the lower halves of their bodies. 00:01:36
In the weightless environment of space, there is almost no stress on the skeletal system. 00:01:44
Bones are no longer providing support to walk and are not being used to maintain body posture. 00:01:49
This lack of stress on the bones may be a key factor in an astronaut's progressive bone loss in space. 00:01:54
Other problems like fluid shift and space motion sickness must be taken into account when providing food to the astronaut crews. 00:02:01
Meals must be chosen that can help slow many of the problems faced by astronauts. 00:02:08
Another major concern for NASA food scientists is the stability of food that is packaged for these missions. 00:02:13
It's vital that the food remain edible for years at a time, staying safe and stable aboard the spacecraft. 00:02:20
This is perhaps one of the most important factors of the planned long-duration missions. 00:02:26
If the food spoils, there are no options currently available to astronauts for nourishment. 00:02:31
With missions to Mars requiring at least three years to complete, stored food must remain shelf-stable for that time, preferably longer. 00:02:36
In the short term, food systems that are currently being used aboard the shuttle and space station are suitable for transit to another world. 00:02:44
But once astronauts arrive, other alternatives need to be considered. 00:02:52
With these thoughts in mind, researchers at NASA are developing new ways to help crews eat well in space. 00:02:56
In addition to storing food aboard the spacecraft, many at NASA believe that growing food in space, or on planetary surfaces, 00:03:02
will need to be perfected to help feed astronauts on these long missions. 00:03:09
Coming up, Jennifer Pulley speaks with Dr. Michelle Perchonok at NASA Johnson Space Center to find out about foods of the future. 00:03:13
But first... 00:03:20
Did you know that freeze-dried ice cream sold in many museums today is not really eaten by our astronauts in space? 00:03:21
In the mid-1960s, scientists blended and froze a mixture of coconut fat, milk solids, and sugar, 00:03:27
then ground and compressed the mixture into cubes under high pressure, making a freeze-dried ice cream. 00:03:33
This concoction was only taken into space once. 00:03:39
In 1968, the Apollo 7 astronauts tested it while orbiting Earth. 00:03:42
Although it is not known exactly what the crew thought of the ice cream, it's telling it was put on only one mission. 00:03:47
Incidentally, the product sold today in the museum is produced differently. 00:03:54
It is simply ice cream cut into cubes, then freeze-dried. 00:03:58
Valoración:
  • 1
  • 2
  • 3
  • 4
  • 5
Eres el primero. Inicia sesión para valorar el vídeo.
Idioma/s:
en
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
756
Fecha:
28 de mayo de 2007 - 17:05
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
04′ 05″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
23.80 MBytes

Del mismo autor…

Ver más del mismo autor

EducaMadrid, Plataforma Educativa de la Comunidad de Madrid

Plataforma Educativa EducaMadrid