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Hubble Telescope Uses Algebra - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect Segment explaining the design and upkeep of the Hubble Space telescope. Also explains how algebra is used with the telescope.

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How do engineers take care of the Hubble Space Telescope while it's in space? 00:00:00
Hey guys, meet Patti Hanson. She works on the Hubble Space Telescope project. 00:00:07
Today, we're at NASA Goddard Space Flight Center in Greenbelt, Maryland. 00:00:12
Okay, Patti, so far we've learned about algebra, optics, telescopes, and a little about the Hubble Space Telescope. 00:00:16
Now, what is NASA Goddard doing to protect the Hubble while it's orbiting around the Earth? 00:00:23
Yeah, and how do engineers like you use algebra in your jobs? 00:00:28
Whoa, those are a lot of questions. 00:00:31
Here at Goddard, we're actually the servicing part of the Hubble Space Telescope project. 00:00:33
We actually prepare scientific instruments, computers, tape recorders to go up on the shuttle, rendezvous with Hubble, 00:00:37
and perform servicing of the telescope. 00:00:46
Astronauts go out into the payload bay, get the new equipment out of carriers, 00:00:49
and install it on the telescope, and we bring the old hardware home. 00:00:54
Now, when we're getting ready for a servicing mission, we have our instruments in our clean room. 00:00:58
And in the clean room, we want to make sure we control contamination by having everyone get dressed in what we call bunny suits. 00:01:03
And you'll see that everybody in the clean room is dressed head to toe in white. 00:01:09
What this does is it controls all the contamination from your clothing, which is lint, your hair. 00:01:14
We don't want any dropped hairs on our science instruments. 00:01:20
And our skin flakes. 00:01:23
Here on Hubble, we're really worried about both particulate and molecular contamination accumulating on the primary and secondary mirrors. 00:01:25
Particulate contamination is like a fine layer of dust that scatters the light 00:01:32
and doesn't allow it to transmit through the optic and gather into the detector very well. 00:01:37
Molecular contamination is a thin film similar to the condensation that you see on this mirror when I squirt it with the nitrogen cleaner. 00:01:42
This doesn't allow the light to be transmitted very well through the optic. 00:01:51
Okay, Van, to get back to your question about how I use algebra in my job, 00:01:55
is that I have an end-of-life requirement for the amount of contamination I can accumulate on flight optics. 00:01:59
Now, for Hubble, that's the primary and secondary mirrors. 00:02:04
End-of-life is the amount of contamination that we can accumulate from the time it was launched 00:02:07
until the time that we no longer expect to take science. 00:02:12
And for Hubble, that's 20 years. 00:02:15
So you're saying that in 20 years, you will accumulate some type of contamination on Hubble's mirrors? 00:02:17
That is correct. 00:02:22
Okay. 00:02:23
And what we do is we take periodic measurements and we compare that to our end-of-life requirement. 00:02:24
Okay, let's look at the algebra Patty is talking about. 00:02:29
NASA engineers know the total amount of contamination on the Hubble has to be less than 5 percent 00:02:32
or the telescope won't work the way it should. 00:02:38
Before Hubble was launched, three measurements for contamination were taken. 00:02:40
The first was 8 tenths of a percent. 00:02:44
The second was 6 tenths of a percent. 00:02:46
And the third was 1 tenth of a percent. 00:02:48
The total amount of contamination on the Hubble consists of the amount of contamination measured on Earth 00:02:50
plus the amount of contamination that it collects on orbit. 00:02:56
If we substitute the values we know into the inequality, 00:03:00
we find that the amount of contamination the Hubble can collect on orbit has to be less than 3.5 percent. 00:03:04
Using algebra, you can see that we have plenty of on-orbit margin left 00:03:11
to accumulate contamination on both the primary and secondary optics. 00:03:14
Hey, check it. 00:03:18
Did you know that the Hubble Space Telescope is about the same size as this school bus? 00:03:19
This is where all of the data from the Hubble Space Telescope is continuously being collected. 00:03:24
Back in 1995, NASA Goddard collected images from the Hubble Deep Field. 00:03:30
A few thousand never-before-seen galaxies are visible in this deepest-ever view of the universe. 00:03:35
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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:
381
Fecha:
28 de mayo de 2007 - 16:52
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
03′ 41″
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:
22.10 MBytes

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