Answer:
[tex]\huge\boxed{\sf Circumstellar\ discs }[/tex]
Explanation:
Astronomers discovered matter made up of gas, dust or asteroids etc. around nearby stars. This matter is called circumstellar disc (due to it being ring-shaped). These circumstellar discs are materials out of which planets form.
- Circumstellar discs are one piece of evidence that can help astronomers sort out how the planets in our solar system were formed.
[tex]\rule[225]{225}{2}[/tex]
Hope this helped!
~AH1807
