Categories: Scientists have proposed several categories for classifying terrestrial planets. Silicate planets are the standard type of terrestrial planet seen in the Solar System, which are composed primarily of a silicon-based rocky mantle and a metallic (iron) core.ercury is possible example, which formed close to our Sun and has a metallic core equal to 60â70% of its planetary mass. Coreless planets are another theoretical type of terrestrial planet, one that consists of silicate rock but has no metallic core.
In 1989, the Monica Rambeau incarnation of Captain Marvel was the first female black superhero from a major publisher to get her own title in a special one-shot issue. In 1971, Red Wolf became the first Native American in the superheroic tradition to headline a series.
Matt Cowan/Getty Images. America's favorite Amazon princess turns 75 this year â Wonder Woman first swung her golden lasso in All-Star Comics #8 in December 1941, and she's still fighting for freedom and the rights of women.