Blue straggler
Videos
A blue straggler is a type of star that is more luminous and bluer than expected. Typically identified in a stellar cluster, they have a higher effective temperature than the main sequence turnoff poi
A Hubble Space Telescope image of NGC 6397, with a number of bright blue stragglers present
NGC 6752, a globular cluster that contains a high number of blue straggler stars
47 Tucanae contains at least 21 blue stragglers near its core.
47 Tucanae
Videos
47 Tucanae, also designated as NGC 104, Caldwell 106 or simply 47 Tuc, is a globular cluster located in the constellation Tucana. It is about 4.45 ± 0.01 kpc from Earth, and 120 light years in diamete
Blue straggler
…pulsations and the crowded fields in which these stars are often found. Some blue stragglers have been observed to rotate quickly, with one example in 47 Tucanae observed to rotate 75 times faster than the Sun, which is consistent with formation by collision. The other explanation relies on mass transfer between…
After Omega Centauri, 47 Tucanae is the brightest globular cluster in the night sky.
Multiple stellar populations in 47 Tucanae