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Geometry, Mars Microprobe, and More Water On Mars - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect Segment exploring ideas of water on Mars. It also explains the Mars Microprobe and its navigation on mars and how this relates to geometry.

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Why do scientists suspect that there was once water on Mars? 00:00:00
What is the Mars microprobe and how will it navigate below the surface of Mars? 00:00:09
What is the relationship between geometry and the Mars microprobe? 00:00:13
Okay guys, I'm here with Dr. Robert Mitcheltree, who is working on current explorations into 00:00:18
the Martian landscape. 00:00:23
Right now, we're on top of NASA Langley's Impact Dynamics Facility. 00:00:25
Back in the 1960s, this is where they tested the lunar landers. 00:00:29
Pretty cool. 00:00:32
Dr. Mitcheltree, what on earth are we doing up here? 00:00:33
Well, I like it up here. 00:00:36
You can look down on the surface of the earth from up here. 00:00:38
Like you can look out at the water and how it meanders across the land there. 00:00:42
And we know that even if you remove that water, there would still be a distinctive shape to 00:00:47
the pattern it makes. 00:00:51
And it's those kind of patterns we see on the surface of Mars, but none of them have 00:00:52
any water in them. 00:00:58
And we wonder, where did the water go? 00:00:59
So where do scientists think the water went? 00:01:02
Some of them think it seeped beneath the surface. 00:01:04
And that's the purpose of Mars' microprobe, to go to Mars and look for water beneath the 00:01:08
surface. 00:01:12
Is that the microprobe? 00:01:13
Well, this is just a model of the microprobe. 00:01:14
The actual microprobe is much larger, about the size of a basketball. 00:01:17
But it has this same shape, and it's this shape, it's actually like a right triangle 00:01:21
that is used to fly through the atmosphere of Mars. 00:01:26
As it approaches the planet, it'll be tumbling. 00:01:30
And then when it hits the atmosphere, no matter how it hits the atmosphere, it'll reorient 00:01:31
itself and fly nose forward. 00:01:36
And it'll continue to fly like that, all the way down, accelerating from 17,000 miles an 00:01:38
hour to 400 miles per hour when it strikes the surface. 00:01:43
This outer shell breaks away, and the inside penetrometer, that fist-shaped instrument, 00:01:47
pierces down through the soil and begins looking for water underneath the surface. 00:01:54
So once the microprobe penetrates the surface, how does it find water, or look for water? 00:01:59
Well, this really small, fist-shaped instrument has a small drill in it, and when it's down 00:02:04
in the dirt, it digs with the drill, pulling some dirt inside of it, and it has even a 00:02:11
laser in there also. 00:02:16
And it uses the laser to shine some energy on the dirt, and it measures the outgassing 00:02:17
of the dirt, and that's how it looks for water. 00:02:23
Okay, big deal. 00:02:26
So what if it finds water on Mars? 00:02:27
Water's the key to understanding several interesting aspects about Mars. 00:02:29
We don't go there just to understand if there's water there. 00:02:32
It's what effect water has on other things. 00:02:35
The more interesting question is the question of life. 00:02:39
All life we know on Earth is tied some way to liquid water. 00:02:43
And if we can find water on Mars, we're one step closer to understanding if life ever 00:02:47
existed there or still does. 00:02:52
Well, that's definitely something to think about. 00:02:54
Thanks, Dr. Mitcheltree. 00:02:56
My pleasure. 00:02:57
Appreciate it. 00:02:58
Hey, you. 00:02:59
If you're interested in topics like life on Mars and other Mars explorations, just check 00:03:00
out the website addressed on your screen. 00:03:03
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Idioma/s:
en
Materias:
Matemáticas
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:
249
Fecha:
28 de mayo de 2007 - 16:52
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
03′ 06″
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:
18.75 MBytes

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