![Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/20/2bf59cea292742e6a7a3e540e6b0b457.jpg)
Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)
![Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/20/37fb15bfacc04804a38d26d923b739a4.jpg)
Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)
![Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/20/7bb4cd5501c14419a24715227695d6fa.jpg)
Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)
![Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)](http://www.ecns.cn/hd/2019/02/20/5262f1721b4c4ab9a743ca08237e9761.jpg)
Data on just two percent of the night sky has revealed hundreds of thousands of previously undetected galaxies, according to a major new radio sky survey of the night sky by the Low-Frequency Array (LOFAR) telescope, a European network of radio antenna. (Photo/Agencies)