Resultado da Busca
Há 20 horas · Vladimir Putin will hold meetings with Xi Jinping and Recep Tayyip Erdogan in Kazakhstan, Russian state news agency reports. Meanwhile, Hungary's prime minister is in Kyiv for the first time since ...
Há 20 horas · In astronomy, stellar classification is the classification of stars based on their spectral characteristics. Electromagnetic radiation from the star is analyzed by splitting it with a prism or diffraction grating into a spectrum exhibiting the rainbow of colors interspersed with spectral lines. Each line indicates a particular chemical element ...
