Правильно расставить артикль. 1) earth is planet. 2) sun is star. 3) earth moves around sun. 4) galaxy is large group of stars. 5) people started to travel to space in the 20th century. 6) there are thousands of millions of stars in galaxy.

1) _the__ Earth is _a__ planet.
2) __the_ Sun is __a_ star.
3) _the_ Earth moves around __the_ Sun.
4) __the_ galaxy is _a__ large group of stars.
5) People started to travel to ___ space in the 20th century.
6) There are thousands of millions of stars in __the_ Galaxy.