Smaller light echoes have been seen around super novae .
在超新星附近可以看到微弱的光反射。
The average is two or three bright novae in a century .
平均一个世纪有两三颗很亮的新星。
But for the novae theory to be true , faster moving material from the supernova should eventually catch up and collide with the gas and dust from the nova eruptions .
