The annual celebration of our Independence Day will dazzle the skies but will come with more sizzling heat with air quality ...

The blue and green light is scattered so well that you can hardly see it. The sky is colored, instead, with red and orange light. Colors mean a lot to us in so many different ways.

Sky This Week is brought to you in part by Celestron. Friday, July 4Mercury reaches its greatest eastern elongation (26°) ...

Uranus will also be on show, if you fancy a more challenging target. Early risers are in for a celestial treat on July 5, ...

We asked them to follow a light therapy routine in which they administered blue light to themselves, at home, by sitting in front of light boxes. Each morning and evening, they spent two hours ...

Lower humidity and drier air mean less scattering of blue light, allowing more blue to reach our eyes and making the sky appear more intensely blue. The changing color of the leaves also plays a role.

Blue light has a shorter wavelength, due to which it’s scattered more easily by the tiny molecules in the air. This scattering, known as Rayleigh scattering, is why we see a blue sky during the day.

As a result, most of the blue and violet light gets scattered out, leaving behind colours with longer wavelengths, like red, orange, and yellow. This is why we often see beautiful red and orange ...

It’s visible in the early-morning sky at magnitude 0.4 and rises nearly an hour before the Sun. Roughly half an hour before sunrise, Mercury has reached an altitude of 4° high in the east.