A green visitor is going to make its closest approach to Earth this week. Comet C/2022 E3 (ZTF) is visible in binoculars or a telescope from Canada and depending on what happens in the coming days, it may enter naked-eye visibility. Comets are notoriously difficult to predict, however, as luminosity (inherent brightness) depends on factors such as how much gas and dust streams off their surfaces, …
Read More »Comet Lovejoy Survives Brush with the Sun
After grazing the Sun’s corona at a distance of 120,000 km from the Sun’s surface Comet Lovejoy emerged on the other side of the Sun still intact. Images supplied by NASA’s Solar Dynamics Observatory.
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