Question

1. this photograph, known as the extreme deep field (xdf), shows the hubble space telescopes observations of a tiny section of space. the section is so small that it is similar to looking at the sky through a drinking straw. thousands of galaxies were recorded. what does this tell you about the number of galaxies that exist in the universe?

the xdf photo was made using photographs taken over a period of ten years by the hubble space telescope. it shows a tiny section of the distant universe and contains thousands of galaxies.
galaxies
based on data such as the hubble extreme deep field photograph, scientists estimate that there are tens of billions of galaxies in the universe. one of the closest galaxies is the andromeda galaxy, which is about 3 million light - years from earth. the most distant galaxies are more than 10 billion light - years away.
the extreme deep field (xdf) photo shows a portion of the sky that is much smaller than the area taken up by the moon.
explore data collection

1. when astronomers such as leavitt and hubble were observing the brightness of stars, they had to manually adjust their telescopes and take images over long periods of time. modern research telescopes are controlled by computers. what are some ways that being able to control a telescope with a computer might allow us to gather more data about objects in space? choose all that apply.

a. computers are able to control the telescopes with more precision than humans.
b. computers can understand the data better than human observers.
c. computers can adjust the telescope to take images of an exact location many times.
d. computers can process data faster than humans.

Explanation:

• Option A: Computers can control telescopes with higher precision than human manual adjustments, enabling more accurate data collection.
• Option B: Understanding data is a cognitive task; computers don't "understand" data better in the way humans interpret, so B is incorrect.
• Option C: Computers can repeatedly adjust telescopes to image the exact same location, which helps in gathering consistent data over time.
• Option D: Computers process data faster, allowing quicker analysis and more data collection in a given time.

Answer:

A. Computers are able to control the telescopes with more precision than humans.
C. Computers can adjust the telescope to take images of an exact location many times.
D. Computers can process data faster than humans.