![subject](/tpl/images/cats/himiya.png)
Astronomers have developed several ways to measure the vast distances between Earth and the stars and galaxies. What do you know about two of these techniques?
A. An astronomical unit is about 93 million kilometers.
B. The A. U. is used to measure distance within our solar system.
C. A light-year (ly) is the distance that light can travel in one year in a vacuum.
D. An astronomical unit (A. U.) is the average distance between the Earth and the Sun.
E. Astronomers measure distances to objects which are outside our solar system in light-years.
![ansver](/tpl/images/cats/User.png)
Answers: 2
Another question on Chemistry
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 02:20
Brainliesttt me asap! the below reaction can be categorized as more than one type of reaction. which reactions are these, and what are the types of reactions?
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 04:30
Use the drop-down menus to answer each question. which runner finished the 100 m race in the least amount of time? which runner stopped running for a few seconds during the race? at what distance did anastasia overtake chloe in the race?
Answers: 1
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 14:00
What mass of natural gas (ch4) must you burn to emit 276 kj of heat?
Answers: 2
![question](/tpl/images/cats/himiya.png)
Chemistry, 22.06.2019 20:00
State one important difference between a physical change and a chemical change?
Answers: 1
You know the right answer?
Astronomers have developed several ways to measure the vast distances between Earth and the stars an...
Questions
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/himiya.png)
![question](/tpl/images/cats/en.png)
English, 01.04.2020 21:30
![question](/tpl/images/cats/istoriya.png)
![question](/tpl/images/cats/biologiya.png)
Biology, 01.04.2020 21:30
![question](/tpl/images/cats/istoriya.png)
History, 01.04.2020 21:30
![question](/tpl/images/cats/fizika.png)
Physics, 01.04.2020 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 01.04.2020 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 01.04.2020 21:30
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/informatica.png)
Computers and Technology, 01.04.2020 21:30
![question](/tpl/images/cats/mat.png)
Mathematics, 01.04.2020 21:31
![question](/tpl/images/cats/mat.png)
Mathematics, 01.04.2020 21:31
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/en.png)
![question](/tpl/images/cats/ekonomika.png)
![question](/tpl/images/cats/biologiya.png)
![question](/tpl/images/cats/istoriya.png)
History, 01.04.2020 21:31
![question](/tpl/images/cats/fizika.png)
![question](/tpl/images/cats/mat.png)
Mathematics, 01.04.2020 21:31