![Objectives: Learn what units scientists measure distances in space. Define and use an astronomical unit to measure distances in space. Define and use a. - ppt download Objectives: Learn what units scientists measure distances in space. Define and use an astronomical unit to measure distances in space. Define and use a. - ppt download](https://images.slideplayer.com/33/8177801/slides/slide_6.jpg)
Objectives: Learn what units scientists measure distances in space. Define and use an astronomical unit to measure distances in space. Define and use a. - ppt download
![A few definitions Light year (ly): Distance light travels in one years (about 10 trillion km) Andromeda Galaxy – 2.4 million light years away. - ppt video online download A few definitions Light year (ly): Distance light travels in one years (about 10 trillion km) Andromeda Galaxy – 2.4 million light years away. - ppt video online download](https://slideplayer.com/slide/234600/1/images/3/A+Few+Definitions.jpg)
A few definitions Light year (ly): Distance light travels in one years (about 10 trillion km) Andromeda Galaxy – 2.4 million light years away. - ppt video online download
![An immense cluster of galaxies located 2 2 billion light years away hi-res stock photography and images - Alamy An immense cluster of galaxies located 2 2 billion light years away hi-res stock photography and images - Alamy](https://c8.alamy.com/comp/D99AMX/this-image-from-nasas-hubble-space-telescope-shows-the-inner-region-D99AMX.jpg)