Profile picture
AeroDork @AeroDork
, 5 tweets, 2 min read Read on Twitter
Back in 2013 Curiosity caught a solar eclipse courtesy of Mars' potato-shaped moon, Phobos.
Phobos is small compared to our moon.

Phobos Mean Radius: 7 miles
Our Moon's Mean Radius: 1,079 miles
It orbits much closer to the Martian surface than our moon, so its apparent magnitude it pretty large (vs. Deimos (L) and our Moon (R)).
Phobos is a little too close to Mars' surface for comfort.

Surface to our Moon: 238,900 mi
Surface to Phobos: 3,700 mi

That's lower than many commercial satellites, but it's a 13 mile wide red rock.
Phobos moves very, very quickly across the Martian sky. It rises and sets twice each day.

Here's how fast Phobos looks in real time from the surface of Mars. (Smaller moon Deimos passes behind)
Missing some Tweet in this thread?
You can try to force a refresh.

Like this thread? Get email updates or save it to PDF!

Subscribe to AeroDork
Profile picture

Get real-time email alerts when new unrolls are available from this author!

This content may be removed anytime!

Twitter may remove this content at anytime, convert it as a PDF, save and print for later use!

Try unrolling a thread yourself!

how to unroll video

1) Follow Thread Reader App on Twitter so you can easily mention us!

2) Go to a Twitter thread (series of Tweets by the same owner) and mention us with a keyword "unroll" @threadreaderapp unroll

You can practice here first or read more on our help page!

Did Thread Reader help you today?

Support us! We are indie developers!


This site is made by just three indie developers on a laptop doing marketing, support and development! Read more about the story.

Become a Premium Member and get exclusive features!

Premium member ($30.00/year)

Too expensive? Make a small donation by buying us coffee ($5) or help with server cost ($10)

Donate via Paypal Become our Patreon

Thank you for your support!