Research Highlights and News

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Constraining nature of ultra-light dark matter particles with 21cm forest

The ultra-light scalar fields can arise ubiquitously, for instance, as a result of the spontaneous breaking of an approximate symmetry such as the axion and more generally the ultra-light particles (ULPs). In addition to the particle physics motivations, these particles can also play a major role in cosmology by contributing to dark matter abundance and affecting the structure formation at sub-Mpc scales.


Recruitment procedures for PhD students 2020

The recruitment procedures and admission list for DoA PhD students in 2020 can be found here.


Logo for the Department of Astronomy

Department of Astronomy (DoA) of Tsinghua University is announcing its logo today. The logo is designed to be an abstract from a common phenomenon in the Universe — a spiral disk and associated jets, which can be found in many astronomical  systems including proto-stellar systems, accreting black holes, gamma-ray bursts, and galaxies, ranging across a huge scale in mass, size, and energy. The "spiral disk" in the logo implies the accretion of knowledge and convergence of talents, while the "jet" represents the extension of research, discoveries to the unknowns, as well as feedback to the community and society.


2019 DoA and THCA Welcome Party

The Department of Astronomy, Tsinghua University held "2019 DoA and THCA Welcome Party" on 22 Aug 2019. New coming graduate students and postdocs, senior student representatives as well as the THCA faculty members participated.


New insight into Jupiter’s diluted core

Jupiter was smacked head-on by a massive planetary embryo about 4.5 billion years ago in the early solar system, according to a new study published in the journal Nature on August 15, 2019. An international collaboration team including two astronomers from Tsinghua University, Dr. Xiaochen Zheng from Department of Astronomy and Department of Physics and Prof. Doug Lin from Institute for Advanced Study, demonstrate their giant impact scenario can explain Jupiter’s large diluted core inferred from Jupiter’s gravity field measurement by the Juno mission. The study was led by Dr. Shangfei Liu from Sun Yat-Sen University. The paper can be found at


Wandering Earth

The 25th “New Worlds, New Horizons” Public Astronomy Lecture took place in the Xijie lecture hall of Tsinghua University on Apr. 17th, 2019. It was delivered by Dr. GOU Lijun from the National Astronomical Observatory, Dr. YU Jun (Steed) from, and Prof. MAO Shude from the Tsinghua University. It attracted a large amount of audience on site and over one hundred fifty thousand online viewers via the Tencent News live broadcast.