Trong thien van hoc, vung o đuoc quanh sao (tieng Anh: circumstellar habitable zone, CHZ), hay đon gian la vung o đuoc, la vung khong gian bao quanh mot ngoi sao va co khoang cach đen ngoi sao đo mot khoang đu lon đe tao đieu kien cho nhung hanh tinh co be mat nam trong vung nay co the duy tri nuoc o trang thai long va đu ap suat khi quyen. Nho đo, su song co kha nang phat trien đuoc tren nhung hanh tinh nay. Vung o đuoc thuong noi đen hai pham vi la: trong mot he hanh tinh va trong mot thien ha. Cac hanh tinh va ve tinh tu nhien trong nhung vung nay la nhung ung cu vien tiem nang cho su song phat trien va co kha nang ton tai su song ngoai Trai Đat tren cac thien the nay giong nhu chung ta. Khai niem nay noi chung khong bao gom cac ve tinh tu nhien do van chua co đu chung cu va ly thuyet neu bat nhung kieu Mat Trang nao co the o đuoc khi tinh đen hanh tinh ma no quay quanh.
Khu vuc co the song đuoc khong nen lan lon voi đac tinh o đuoc cua hanh tinh. Trong khi đac tinh o đuoc cua hanh tinh chi noi đen nhung đieu kien yeu cau cua hanh tinh cho phep duy tri su song dang cacbon, thi khu vuc co the song đuoc noi đen nhung đieu kien yeu cau cua ngoi sao cho phep duy tri su song cacbon, va hai nhan to nay khong phai luc nao cung trao đoi cho nhau đuoc.
Vung HZ cung con goi la "vung su song", "vung tien nghi", "vanh đai xanh" hay "vung Goldilocks".


Chu thich Xem them Ross 128 b
 K2-18 b
Hanh tinh Hycean


Lien ket ngoai The Encyclopedia of Astrobiology, Astronomy and Spaceflight (Habitable Zone)
The Encyclopedia of Astrobiology, Astronomy and Spaceflight (Galactic Habitable Zone)
"Stars and Habitable Planets" at SolStation
On the Galactic Habitable Zone
Swiss Scientist: Search for Life Next
Stephen H. Dole and Issac Asimov's Planets for Man Defining what environment is habitable for people. (copyright 1964)
NASA: The Goldilocks Zone Luu tru ngay 14 thang 7 nam 2009 tai Wayback Machine
Interstellar Real Estate: Location, Location, Location – Defining the Habitable Zone
Definition of "goldilocks" connoting "moderate characteristics" and examples referring to planets dating to 1935.
"Exoplanet Habitable Zone Candidates: exoplanets in terms of their historical chances for residing in the habitable zone". www.planetarybiology.com. Ban goc luu tru ngay 6 thang 3 nam 2009.
"Exoplanets in relation to host star's current habitable zone". www.planetarybiology.com.
"exoExplorer: a free Windows application for visualizing exoplanet environments in 3D". www.planetarybiology.com.
"Calculating the location of habitable zone at zero age main sequence (ZAMS)" (PDF). www.planetarybiology.com. Ban goc (PDF) luu tru ngay 11 thang 5 nam 2006. Truy cap ngay 10 thang 11 nam 2008.
Shiga, David (ngay 19 thang 11 nam 2008). "Why the universe may be teeming with aliens". Space. NewScientist. Truy cap ngay 19 thang 11 nam 2009.
Seager, Sara. "Characterizing Earth-like planets with Terrestrial Planet Finder". arXiv. Truy cap ngay 31 thang 3 nam 2010.
"Kepler Mission to Hunt for Earth-like Planets". Science@NASA. ngay 20 thang 2 nam 2009. Ban goc luu tru ngay 16 thang 3 nam 2010. Truy cap ngay 31 thang 3 nam 2010.
Simmonsa. "The New Worlds Observer: a mission for high-resolution spectroscopy of extra-solar terrestrial planets" (PDF). New Worlds. Truy cap ngay 31 thang 3 nam 2010.
Cockell (2009). "Darwin—an experimental astronomy mission to search for extrasolar planets" (PDF). Springerlink. tr. 435–461. doi:10.1007/s10686-008-9121-x.
Atkinson, Nancy (ngay 19 thang 3 nam 2009). "JWST Will Provide Capability to Search for Biomarkers on Earth-like Worlds". Universe Today. Ban goc luu tru ngay 23 thang 3 nam 2009. Truy cap ngay 31 thang 3 nam 2010.{{Chu thich web}}:  Quan ly CS1: bot: trang thai URL ban đau khong ro (lien ket)
"PlanetQuest: Mission". SIM PlanetQuest. Ban goc luu tru ngay 19 thang 12 nam 2010. Truy cap ngay 31 thang 3 nam 2010.