That makes it the biggest known crater in our solar system and it may well be the oldest.

这使它成为太阳系中已知最大的陨石坑，也可能是最古老的陨石坑。

youdao

Other planets in our solar system lack the oxygen atmosphere that helps explain why life exists on Earth.

我们太阳系的其他行星缺乏氧气大气层，这有助于解释为什么地球上存在生命。

youdao

The nearly circular orbits of planets in our solar system led scientists to expect that planets around other stars would also reside in circular orbits.

在我们的太阳系中，行星的轨道几乎是圆形的，这使得科学家们预测，其他恒星周围的行星也会位于圆形轨道上。

youdao

Mars Day at the Smithsonian Air and Space Museum in Washington is a celebration of our solar system's most famous planet.

VOA: special.2010.07.28

It was the name given to permanent, cloudy areas in the sky outside our solar system.

VOA: special.2009.04.29

After 50 years of silence, I think the time has come to take stock and say, maybe we should mobilize all of the sciences to look for anything fishy, anything weird,any anomaly, both in our own little corner of the universe here on Earth and in the solar system, and far out across the galaxy."

VOA: standard.2010.04.16

In our Solar System, we believe the Sun has accreted about two-and-a-half Earth-masses of rocky material.

BBC: 'Hungry' stars reveal planet presence

So, that means that there was not that violence in our solar system.

NPR: What Makes Our Solar System Special?

We think there may have been some violent events in our solar system.

NPR: What Makes Our Solar System Special?