[填空题]
When our Sun becomes *hri. nan;wo,8pk c 3:ehnt..hq e*snz :xkn 8a white dwarf, it is expected 3c *o0ltp2 uohto be about the size of the Moon. What angular w*u2tp3 c0olo hidth will it subtend from the present distance to Earth? $\phi = $ $\times 10^{-5}\ \text{rad}$
