lunedì, Luglio 31, 2023
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Blog di astronomia e astrofotografia amatoriale – News di astronomia

La prima foto del buco nero al centro della Via Lattea

Un altro successo straordinario, che stavolta ci riguarda più da vicino, per l'Event Horizon Telescope Consortium. Grazie infatti ad una rete di radiotelescopi sparsa...

L’ammasso stellare aperto M36

Bentornati al nostro appuntamento con il Catalogo di Messier. Oggi parleremo di M36, un ammasso stellare aperto situato a 3800 anni luce di distanza...

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Una galassia attiva a forma di papillon

Gli astronomi stanno studiando una galassia dalla curiosa forma di papillon. Si tratta di Txs 0128+554, una galassia attiva situata a 500 milioni di...
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NASA APOD

Phobos over Mars

31/07/2023

Phobos over Mars

Why is Phobos so dark? Phobos, the largest and innermost of the two Martian moons, is the darkest moon in the entire Solar System. Its unusual orbit and color indicate that it may be a captured asteroid composed of a mixture of ice and dark rock. The featured assigned-color picture of Phobos near the edge of Mars was captured in late 2021 by ESA's robot spacecraft Mars Express, currently orbiting Mars. Phobos is a heavily cratered and barren moon, with its largest crater located on the far side. From images like this, Phobos has been determined to be covered by perhaps a meter of loose dust. Phobos orbits so close to Mars that from some places it would appear to rise and set twice a day, while from other places it would not be visible at all. Phobos' orbit around Mars is continually decaying -- it will likely break up with pieces crashing to the Martian surface in about 50 million years. Your Sky Surprise: What picture did APOD feature on your birthday? (post 1995)