A passive and multi-channel microwave sounder onboard the Chang'e-2 orbiter has successfully acquired microwave observations of the lunar surface and subsurface
New photometry for two Algol-type binaries, EU Hya(P = 0.7782 d) and AW Vul(P =0.8065 d), was carried out using the 60-cm telescope at Xinglong station of Natio
We make use of the recent large sample of 17 042 Mg Ⅱ absorption systems from Quider et al. to analyze the evolution of the redshift number density. Regardless