< ![CDATA[In 2009, Landsat 5 completed 25 years of collecting data – 22 years beyond its design life.]]>

STELLA: A DIY Handheld Scientific Instrument
If you are looking for a do-it-yourself (DIY) handheld spectrometer, you need to meet STELLA. STELLA (Science and Technology Education for Land/Life Assessment) is a portable scientific instrument developed by