Science, Maths & Technology
An introduction to exoplanets
...work on trying to find as many planets as possible around the stars closest to the Sun. Galaxies tend to fall into two groups: spiral galaxies (Figure 19), such as the Milky Way, which contain stars of a variety of ages, including young stars that are still forming elliptical galaxies (Figure 20), which contain mostly older stars and look like fuzzy blobs. Spiral galaxies...