Fermi Space Telescope's large-area camera (LAT) is exploring the high-energy universe by surveying the sky in the gamma-ray band, which is 50 million times higher than visible light energy. The above all-day map was constructed with the data from August 4th to1October 30th, 2008 10 obtained by a large-area camera. Compared with similar space observation missions in the past, this is a deeper and higher resolution gamma-ray all-day map. What bright light sources are there in the gamma-ray sky of Fermi telescope? A recent paper describes the 205 brightest gamma ray sources, and the image above shows 10 the brightest gamma ray sources: 5 in our galaxy and 5 outside it. In our galaxy, there are: the sun dragging an arc during observation, the X-ray binary star LSI +6 1303 about 6500 light years away from us, and the flash burst PSR J65438 and the globular cluster Du Fu 47(47Tuc) about 1836+5925 light years away from us. This unknown light source is very interesting, because it is a variable light source, and there is no corresponding celestial body in other bands. The bright sources outside our galaxy are NGC 1275, a large galaxy in the center of perseus cluster, which is about 203 million light years away from us, and 3C 454.3, PKS 1502+ 107, PKS0727-1/KLOC-0, which are several billion light years away from us.