![This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble\'s Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)](http://www.ecns.cn/hd/2019/01/08/eb4d792792ef4d86957a51bd6aa0cf01.jpg)
This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble's Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)
![This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble\'s Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)](http://www.ecns.cn/hd/2019/01/08/eab77ebd07c44a4293f2815628600462.jpg)
This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble's Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)
![This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble\'s Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)](http://www.ecns.cn/hd/2019/01/08/985d906d13034956a9aa84c50be06f2d.jpg)
This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble's Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)
![This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble\'s Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)](http://www.ecns.cn/hd/2019/01/08/e075d8aff89648068b80b74bca0415d2.jpg)
This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble's Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)
![This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble\'s Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)](http://www.ecns.cn/hd/2019/01/08/5346e030bd2744b0951120dc2c6a9104.jpg)
This gigantic image of the Triangulum Galaxy -- also known as Messier 33 -- is a composite of about 54 different pointings with Hubble's Advanced Camera for Surveys. With a staggering size of 34 372 times 19 345 pixels, it is the second-largest image ever released by Hubble. It is only dwarfed by the image of the Andromeda Galaxy, released in 2016. (Photo/VCG)