Sheep
Source: This question is taken from the Everyday Science
A class of nucleic acids
Pulsar
Stratosphere
Stellar nurseries
Galvanization
Igneous rock
Geo-morphology
smallest particle of an element which can undergo a chemical reaction
Venus
Flintglass
Nicolas Copernicus
Hubble
Exploration Extravehicular Mobility Unit (xEMU)
Leukocytes
Potential energy
peat
Skunk
Forms a virtual image