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Published January 30, 2023 | Submitted
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ET White Paper: To Find the First Earth 2.0

Ge, Jian
Zhang, Hui ORCID icon
Zang, Weicheng ORCID icon
Deng, Hongping ORCID icon
Mao, Shude ORCID icon
Xie, Ji-Wei
Liu, Hui-Gen ORCID icon
Zhou, Ji-Lin ORCID icon
Willis, Kevin
Huang, Chelsea ORCID icon
Howell, Steve B. ORCID icon
Feng, Fabo ORCID icon
Zhu, Jiapeng
Yao, Xinyu ORCID icon
Liu, Beibei
Aizawa, Masataka ORCID icon
Zhu, Wei ORCID icon
Li, Ya-Ping
Ma, Bo
Ye, Quanzhi ORCID icon
Yu, Jie
Xiang, Maosheng ORCID icon
Yu, Cong
Liu, Shangfei
Yang, Ming
Wang, Mu-Tian
Shi, Xian
Fang, Tong
Zong, Weikai
Liu, Jinzhong
Zhang, Yu
Zhang, Liyun
El-Badry, Kareem ORCID icon
Shen, Rongfeng
Tam, Pak-Hin Thomas
Hu, Zhecheng
Yang, Yanlv
Zou, Yuan-Chuan
Wu, Jia-Li
Lei, Wei-Hua
Wei, Jun-Jie
Wu, Xue-Feng
Sun, Tian-Rui
Wang, Fa-Yin
Zhang, Bin-Bin
Xu, Dong
Yang, Yuan-Pei ORCID icon
Li, Wen-Xiong
Xiang, Dan-Feng
Wang, Xiaofeng ORCID icon
Wang, Tinggui ORCID icon
Zhang, Bing ORCID icon
Jiang, Peng ORCID icon
Yuan, Haibo
Zhang, Jinghua
Wang, Sharon Xuesong ORCID icon
Gan, Tianjun ORCID icon
Wang, Wei
Zhao, Yinan
Liu, Yujuan
Wei, Chuanxin
Kang, Yanwu
Yang, Baoyu
Qi, Chao
Liu, Xiaohua
Zhang, Quan
Zhu, Yuji
Zhou, Dan
Zhang, Congcong
Yu, Yong
Zhang, Yongshuai
Li, Yan
Tang, Zhenghong
Wang, Chaoyan
Wang, Fengtao
Li, Wei
Cheng, Pengfei
Shen, Chao
Li, Baopeng
Pan, Yue
Yang, Sen
Gao, Wei
Song, Zongxi
Wang, Jian
Zhang, Hongfei
Chen, Cheng
Wang, Hui
Zhang, Jun
Wang, Zhiyue
Zeng, Feng
Zheng, Zhenhao
Zhu, Jie
Guo, Yingfan
Zhang, Yihao
Li, Yudong
Wen, Lin
Feng, Jie
Chen, Wen
Chen, Kun
Han, Xingbo
Yang, Yingquan
Wang, Haoyu
Duan, Xuliang
Huang, Jiangjiang
Liang, Hong
Bi, Shaolan
Gai, Ning
Ge, Zhishuai
Guo, Zhao ORCID icon
Huang, Yang
Li, Gang
Li, Haining
Li, Tanda ORCID icon
Rix, Hans-Walter ORCID icon
Shi, Jianrong
Song, Fen
Tang, Yanke
Ting, Yuan-Sen ORCID icon
Wu, Tao
Wu, Yaqian
Yang, Taozhi
Yin, Qing-Zhu ORCID icon
Gould, Andrew
Lee, Chung-Uk ORCID icon
Dong, Subo ORCID icon
Yee, Jennifer C. ORCID icon
Shvartzvald, Yossi ORCID icon
Yang, Hongjing ORCID icon
Kuang, Renkun
Zhang, Jiyuan
Liao, Shilong
Qi, Zhaoxiang
Yang, Jun
Zhang, Ruisheng
Jiang, Chen ORCID icon
Ou, Jian-Wen
Li, Yaguang
Beck, Paul
Bedding, Timothy R. ORCID icon
Campante, Tiago L. ORCID icon
Chaplin, William J. ORCID icon
Christensen-Dalsgaard, Jørgen
Garcia, Rafael A. ORCID icon
Gaulme, Patrick
Gizon, Laurent
Hekker, Saskia ORCID icon
Huber, Daniel ORCID icon
Khanna, Shourya
Liu, Yan
Mathur, Savita ORCID icon
Miglio, Andrea ORCID icon
Mosser, Benoît
Ong, J. M. Joel ORCID icon
Santos, Ângela R. G. ORCID icon
Stello, Dennis ORCID icon
Bowman, Dominic M.
Lares-Martiz, Mariel
Murphy, Simon ORCID icon
Niu, Jia-Shu
Ma, Xiao-Yu
Molnár, László ORCID icon
Fu, Jian-Ning
De Cat, Peter ORCID icon
Su, Jie
ET Consortium

Abstract

We propose to develop a wide-field and ultra-high-precision photometric survey mission, temporarily named "Earth 2.0 (ET)". This mission is designed to measure, for the first time, the occurrence rate and the orbital distributions of Earth-sized planets. ET consists of seven 30cm telescopes, to be launched to the Earth-Sun's L2 point. Six of these are transit telescopes with a field of view of 500 square degrees. Staring in the direction that encompasses the original Kepler field for four continuous years, this monitoring will return tens of thousands of transiting planets, including the elusive Earth twins orbiting solar-type stars. The seventh telescope is a 30cm microlensing telescope that will monitor an area of 4 square degrees toward the galactic bulge. This, combined with simultaneous ground-based KMTNet observations, will measure masses for hundreds of long-period and free-floating planets. Together, the transit and the microlensing telescopes will revolutionize our understandings of terrestrial planets across a large swath of orbital distances and free space. In addition, the survey data will also facilitate studies in the fields of asteroseismology, Galactic archeology, time-domain sciences, and black holes in binaries.

Additional Information

Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0).

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Additional details

Created:
August 20, 2023
Modified:
October 24, 2023