How do astronomers use photodectors

  • Thread starter a.a
  • Start date
In summary, astronomers use photodetectors to capture and analyze light from celestial objects, allowing them to gain a better understanding of the universe. They use a variety of photodetectors, including CCDs, photomultiplier tubes, and photodiodes, each with their own strengths and purposes. To ensure accuracy, astronomers calibrate their photodetectors by comparing them to known sources of light. Photodetectors can also detect light beyond the visible spectrum, including infrared and ultraviolet. Advancements in photodetector technology have greatly impacted astronomy by providing more precise and detailed data, allowing astronomers to study fainter and more distant objects and make groundbreaking discoveries about the cosmos.
  • #1
a.a
127
0

Homework Statement



How do astronomers use photodectors on nasa's Hubble space telescope to produce galactic images?

Homework Equations





The Attempt at a Solution



I can't find any relevant resourses on the topic.. not on the internet either.
 
Physics news on Phys.org
  • #2
I think the HST just uses CCD's. You can check out how they work.
 
  • #3
The current instruments are here http://www.stsci.edu/hst/HST_overview/instruments
Most are CCDs, NICMOS uses a CMOS chip like the one in your digital camera and one of the earlier now repalced instruments FOC used an intensified TV tube.
 

1. How do astronomers use photodetectors to study the universe?

Photodetectors are used by astronomers to capture and measure light from celestial objects. This light can then be analyzed to learn more about the composition, temperature, and movement of these objects. By studying the light emitted from stars, galaxies, and other celestial bodies, astronomers are able to gain a better understanding of the universe and its evolution.

2. What types of photodetectors do astronomers use?

Astronomers use a variety of photodetectors, including charge-coupled devices (CCDs), photomultiplier tubes, and photodiodes. Each type of photodetector has its own strengths and is used for different purposes. For example, CCDs are commonly used for imaging, while photomultiplier tubes are more sensitive and are often used for detecting faint objects.

3. How do astronomers calibrate photodetectors?

To ensure accurate measurements, astronomers must calibrate their photodetectors. This involves comparing the readings from the photodetector to known sources of light with known intensities. This allows astronomers to determine the sensitivity and accuracy of the photodetector and make any necessary adjustments.

4. Can photodetectors detect light beyond the visible spectrum?

Yes, photodetectors can detect light beyond the visible spectrum. In fact, many photodetectors used by astronomers are sensitive to different wavelengths of light, including infrared and ultraviolet. This allows astronomers to study a wide range of objects and phenomena that emit light at different wavelengths.

5. How have advancements in photodetector technology impacted astronomy?

Advancements in photodetector technology have greatly impacted astronomy by allowing astronomers to gather more precise and detailed data about the universe. With improved sensitivity and resolution, photodetectors have enabled astronomers to study fainter and more distant objects, leading to groundbreaking discoveries and a better understanding of the cosmos.

Similar threads

  • Introductory Physics Homework Help
Replies
5
Views
1K
  • Introductory Physics Homework Help
Replies
6
Views
3K
  • Astronomy and Astrophysics
Replies
9
Views
1K
  • Introductory Physics Homework Help
Replies
10
Views
1K
Replies
1
Views
588
  • Introductory Physics Homework Help
Replies
2
Views
787
  • Introductory Physics Homework Help
Replies
2
Views
2K
  • Introductory Physics Homework Help
Replies
4
Views
988
  • Introductory Physics Homework Help
Replies
4
Views
1K
  • Introductory Physics Homework Help
Replies
10
Views
3K
Back
Top