Stefania G. L.

I teach, and tweet at times, hoping to involve...
“Tell me and I forget. Teach me and I remember. Involve me and I learn.” Franklin

[SPACE.com @SPACEdotcom]

The Vera C. Rubin Observatory has released its first images, providing a staggering glimpse at the observing power it will unleash when it begins its decade-long survey. https://t.co/OqTw3aWj4U

[daryavaseum @daryaastrovas]

This ambitious project entailed four consecutive days of continuous moon observation and photography, culminating in an image size of 708 gigabytes, comprised of over 81,000 stacked images.

[Erika  @ExploreCosmos_]

Distance to some galaxies from the Milky Way.
1 light year = 9.5 trillion km.

[Interesting STEM @InterestingSTEM]

Capturing the Speed of light

[Soma Das @somadwrites]

Did you know the Moon looks different depending on where you are on Earth?

For instance, the waning crescent may point left in some places, right in others, and sometimes even resembles the Cheshire Cat's smile!

This variation is due to how the Moon's orientation changes with your latitude.

Observers in the Northern and Southern Poles see the Moon as if it were flipped.

As you move between latitudes, the
Moon appears to rotate by an angle equivalent to the latitude you've crossed.

Video :: starwalkapp

[Andrew McCarthy @AJamesMcCarthy]

I captured the entire "Planetary Parade" using my 11" telescope, and combined everything into one composite photo that stayed true to the angular scale of these objects.

Made entirely with real photos, I hope this composite helps illustrate the scale of these things!

[David Blanchflower BSc @DavidBflower]

Six planets are visible in the sky all at once this month. How to see the planetary alignment. Nice guide from @skyatnightmag https://t.co/cA9kFvfX8m

[Jason Major @JPMajor]

Happy #Solstice! Remember, Earth's 23.4º axial tilt with relation to the plane of its orbit around the Sun is the true "reason for the season!" 🌎🌞

[SpaceX @SpaceX]

Mechazilla has caught the Super Heavy booster!

[Massimo @Rainmaker1973]

If you're seeing the Northern Lights tonight, here's why different colors can appear

[Halo CME @halocme]

MOST POWERFUL FLARE IN SOLAR CYCLE 25.

It was X9.0 in GOES X-ray measurement. It was quite eruptive, leaving a coronal wave. The eruption/CME seemed to result from magnetic reconnection rather than ideally from a pre-existing flux rope. It may come in less than 3 days.

[ESA's Juice mission @ESA_JUICE]

🆕Timelapse! Volume up, sit back and enjoy #ESAJuice's lunar-Earth flyby in all its glory 🤩

[ESA's Juice mission @ESA_JUICE]

Curious to find out more about #ESAJuice's lunar-Earth flyby? Join members of the Juice science and operations team online to hear about perspectives from navigation, science and radiation.
🗓️13:00 CEST, 27 September 2024
Zoom link 👉 https://t.co/lbNjHzFDSa

[ESA's Juice mission @ESA_JUICE]

Say cheese, again! 📸😄

Juice’s scientific camera, JANUS, had a go too at snapping an Earth–Moon portrait, as it sailed off towards Venus.

After its Venus flyby in August 2025, #ESAJuice will be back, passing by Earth again in September 2026 and January 2029.
https://t.co/Or0NrGtK2B

[ESA Earth Observation @ESA_EO]

The arrival of a new season as seen from space!

On 22 September the equinox marked the beginning of Autumn in the Northern Hemisphere and of Spring in the Southern Hemisphere.

This animation shows how the terminator line moved from December 2023 to 20 September 2024.
📸 @eumetsat Meteosat Second Generation data, processed by @simon_sat

[Stuart Atkinson @mars_stu]

Looks like we might have a pretty naked eye comet in the northern sky next month! To find it, face the west after sunset and look for a star with a fuzzy tail. (Note: charts drawn for UK time, use an app for times specific to your own location). Charts made using @skysafariastro

[Massimo @Rainmaker1973]

Did you know?

There's an Interplanetary Transport Network in our Solar System, used to launch spacecraft from Earth and send them to the desired destination.

It is a collection of gravitationally determined pathways through the Solar System that require very little energy for an object to follow.

The ITN makes particular use of Lagrange points as locations where trajectories through space can be redirected using little or no energy.

Interplanetary transfer orbits are solutions to the gravitational three-body problem.

The ITN is based around a series of orbital paths predicted by chaos theory and the restricted three-body problem leading to and from the orbits around the Lagrange points – points in space where the gravity between various bodies balances with the centrifugal force of an object there.

Notable spacecraft that used the ITN were the ISEE-3, launched in 1978, the Hiten lunar mission in 1991, NASA's 2001–2003 Genesis mission, and the Chinese spacecraft Chang'e 2.

[image: stylized depiction of the ITN]

[Corey S. Powell @coreyspowell]

This is the surface of another star! Polaris, imaged by the CHARA array.

Explorers have navigated by Polaris for centuries, but now for the first time we can see what it actually looks like.

https://t.co/e1gX3YpRzE

[James Lucas @JamesLucasIT]

Thread of crazy painting details 🧵

1. It's all in the eyes

[Matthew Dominick @dominickmatthew]

Satellites, stars, and, a meteor . . . Night timelapse just prior to sunrise. If you watch carefully, part way through you can see a meteor streak towards earth.

I do not have the settings readily available, but they are likely: 50mm, f1.2, ISO 6400, 1/4s, with a 1/2s interval.