Starter Quiz

Which of these gives out its own heat and light?

Select one answer

The Moon

Mars

The Sun

Earth

2 Mars, NASA and STScI, 1999, courtesy of Hubblesite.org, 4 Earthstar Geographics, Source: Airbus,USGS,NGA,NASA,NOAA,GEBCO,CGIAR,NLS,OS,NMA,Geodatastyrelsen,GSA,GSI and the GIS User Community