lecture07

lecture07 - Astronomy 3: The Nature of the Universe...

Info iconThis preview shows pages 1–11. Sign up to view the full content.

View Full Document Right Arrow Icon
Astronomy 3: The Nature of the Universe Professor Alice Shapley Lecture 7: The Solar System (NGC 1499 Image credit: Markus Noller, Deep Sky Images)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Logistics • Quiz #3: due Monday, April 25 th , 10 pm. • Available today after class at CCLE website Lab this week on:
Background image of page 2
Logistics Midterm #1 , this Thursday, April 21 st , in class. The midterm will take place in the regular lecture hall, Math Sciences 4000A -- i.e., this room. Most important : bring a photo ID and a #2 (i.e. normal) pencil. Recommended: bring a calculator (though you may not need it). I will provide scantrons. I will not have office hours this afternoon. If you missed the review sessions yesterday, find out what we went over from someone who attended.
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Logistics Exam will have a mixture of multiple choice, matching, and true/false. Exam will be based on the course material up through and including “Light and Telescopes.” This corresponds to lectures 1-5 and the first part of lecture 6 (today). The relevant reading from the textbook is: Chapters 1-6. A few questions will be based on Labs 1-2.
Background image of page 4
Review from Last Time Telescopes: collecting area, angular resolution; refracting vs. reflecting. Multi-wavelength. Instrumentation: imaging and spectroscopy. Reasons for putting telescopes in space? Particularly impressive telescope technologies: adaptive optics; interferometry. Both technologies provide increased angular resolution (i.e. sharper images). Started discussing the solar system.
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
How do telescopes help us learn about the universe? Telescopes collect more light than our eyes light-collecting area Scales as (Telescope Diameter) 2 10-m telescope is 100 times better than a 1-m telescope? Telescopes can see more detail than our eyes angular resolution Smallest angular size resolved scales as 1/(Telescope Diameter) 10-m telescope can resolve 10 times finer detail than 1-m telescope? Telescopes + instruments can detect light that is invisible to our eyes (e.g., infrared, ultraviolet).
Background image of page 6
Different wavelengths, different information
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Basic Telescope Designs • Refracting lenses lenseslenses Refracting telescope Yerkes 1-m refractor, Chicago Rarely used by professional astronomers now
Background image of page 8
Basic Telescope Designs Reflecting curved mirrors Most research telescopes today are reflecting Reflecting telescope Keck 2 × 10-m, Hawaii
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Instrumentation What do astronomers do with telescopes? Imaging: cameras record “photographs” (i.e. digital images) of astronomical objects on detectors, often using specific color filters. Measure how much light there is from the object, and its structure. Spectroscopy
Background image of page 10
Image of page 11
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 57

lecture07 - Astronomy 3: The Nature of the Universe...

This preview shows document pages 1 - 11. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online