Dennis
@martiandennis.bsky.social
NASA Systems Engineer & Mars postcard maker. Europa Clipper SE and Perseverance Rover engineering cameras I&T Lead. All opinions are my own.
Dust devils captured by Perseverance's left NavCam on Sol 1617.
September 10, 2025 at 10:57 PM
Dust devils captured by Perseverance's left NavCam on Sol 1617.
September 8, 2025 at 11:07 PM
Postcard from Mars: Perseverance Rover posed for a selfie after completing the latest sampling activities on Sol 1500 (May 10, 2025) and commemorating over 1,500 days on Mars.
May 10, 2025 at 5:19 PM
Postcard from Mars: Perseverance Rover posed for a selfie after completing the latest sampling activities on Sol 1500 (May 10, 2025) and commemorating over 1,500 days on Mars.
Postcard from Mars: Perseverance collected a new sample as shown in this CacheCam image taken on Sol 1490 (4/29/25).
April 30, 2025 at 4:32 PM
Postcard from Mars: Perseverance collected a new sample as shown in this CacheCam image taken on Sol 1490 (4/29/25).
Postcard from Mars taken on Sol 1477 (April 16, 2025). See where the Perseverance rover is currently at here: science.nasa.gov/mission/mars...
April 16, 2025 at 5:55 PM
Postcard from Mars taken on Sol 1477 (April 16, 2025). See where the Perseverance rover is currently at here: science.nasa.gov/mission/mars...
Sol 1472 (Apr 11, 2025) - Perseverance Rover met a little rock friend on the way to 'Salmon Point.'
April 15, 2025 at 4:19 PM
Sol 1472 (Apr 11, 2025) - Perseverance Rover met a little rock friend on the way to 'Salmon Point.'
This postcard from the surface of Mars was taken a couple of days ago, on Sol 1463 (April 1st).
April 8, 2025 at 9:47 PM
This postcard from the surface of Mars was taken a couple of days ago, on Sol 1463 (April 1st).
Look at this amazing picture of an Einstein ring, which is actually an image of two galaxies that are in reality, separated by a large distance. It appears as one galaxy due to the effect of gravitational lensing that bends the light from a very distant object around a massive intermediate object.
April 1, 2025 at 8:18 PM
Look at this amazing picture of an Einstein ring, which is actually an image of two galaxies that are in reality, separated by a large distance. It appears as one galaxy due to the effect of gravitational lensing that bends the light from a very distant object around a massive intermediate object.
Welcome home Crew-9!
March 18, 2025 at 9:59 PM
Welcome home Crew-9!
Near Earth Object (NEO) Surveyor telescope and ASTHROS telescope are currently both collocated in the spacecraft assembly facility highbay.
March 18, 2025 at 7:41 PM
Near Earth Object (NEO) Surveyor telescope and ASTHROS telescope are currently both collocated in the spacecraft assembly facility highbay.
NASA Astrobiology on Twitter had a really cute gif of Perseverance Rover waving to Europa Clipper as it performs a Mars flyby on March 1st. It's too good to not share it here. Kudos to the artist! Perseverance will actually attempt to image it during the flyby.
Image credit: x.com/NASAAstrobio...
Image credit: x.com/NASAAstrobio...
February 28, 2025 at 10:53 PM
NASA Astrobiology on Twitter had a really cute gif of Perseverance Rover waving to Europa Clipper as it performs a Mars flyby on March 1st. It's too good to not share it here. Kudos to the artist! Perseverance will actually attempt to image it during the flyby.
Image credit: x.com/NASAAstrobio...
Image credit: x.com/NASAAstrobio...
On March 1st, Europa Clipper will flyby Mars and use its gravity to help bend its trajectory and position for an Earth flyby in December 2026, before it slingshots towards the Jupiter system. Check out the animation in the link below.
www.jpl.nasa.gov/news/nasas-e...
eyes.nasa.gov/apps/solar-s...
www.jpl.nasa.gov/news/nasas-e...
eyes.nasa.gov/apps/solar-s...
February 25, 2025 at 9:43 PM
On March 1st, Europa Clipper will flyby Mars and use its gravity to help bend its trajectory and position for an Earth flyby in December 2026, before it slingshots towards the Jupiter system. Check out the animation in the link below.
www.jpl.nasa.gov/news/nasas-e...
eyes.nasa.gov/apps/solar-s...
www.jpl.nasa.gov/news/nasas-e...
eyes.nasa.gov/apps/solar-s...
Today marks the 4th anniversary of the Perseverance rover landing! It has taken over 93,101 images to-date with its engineering cameras.
Image credit: NASA/JPL-Caltech
Image credit: NASA/JPL-Caltech
February 18, 2025 at 5:47 PM
Today marks the 4th anniversary of the Perseverance rover landing! It has taken over 93,101 images to-date with its engineering cameras.
Image credit: NASA/JPL-Caltech
Image credit: NASA/JPL-Caltech
Glad to see that the star trackers are working on Europa Clipper! They are a part of the Guidance, Navigation and Control (GNC) system that help the spacecraft find its way through space. www.jpl.nasa.gov/news/en-rout...
Image credit: NASA/JPL-Caltech
Image credit: NASA/JPL-Caltech
February 7, 2025 at 1:09 AM
Glad to see that the star trackers are working on Europa Clipper! They are a part of the Guidance, Navigation and Control (GNC) system that help the spacecraft find its way through space. www.jpl.nasa.gov/news/en-rout...
Image credit: NASA/JPL-Caltech
Image credit: NASA/JPL-Caltech
Meet ASTHROS, a far-infrared telescope that will be lifted up to the stratosphere by a football stadium-sized balloon over Antarctica. It is currently in the high-bay for all visitors to see. www.jpl.nasa.gov/news/nasa-mi...
February 6, 2025 at 3:41 AM
Meet ASTHROS, a far-infrared telescope that will be lifted up to the stratosphere by a football stadium-sized balloon over Antarctica. It is currently in the high-bay for all visitors to see. www.jpl.nasa.gov/news/nasa-mi...
Sol 1400 - Perseverance Rover is currently exploring the area near 'Witch Hazel Hill' where it is looking to collect the next sample.
Image credit: NASA/JPL-Caltech/martiandennis
Image credit: NASA/JPL-Caltech/martiandennis
January 27, 2025 at 11:18 PM
Sol 1400 - Perseverance Rover is currently exploring the area near 'Witch Hazel Hill' where it is looking to collect the next sample.
Image credit: NASA/JPL-Caltech/martiandennis
Image credit: NASA/JPL-Caltech/martiandennis
First week back on lab after Eaton Fire.
January 22, 2025 at 7:56 PM
First week back on lab after Eaton Fire.
Sol 1354 - Perseverance rover looking back after having arrived at the Lookout Hill.
Image credit: NASA/JPL-Caltech/areo.info/martiandennis
Image credit: NASA/JPL-Caltech/areo.info/martiandennis
December 11, 2024 at 11:02 PM
Sol 1354 - Perseverance rover looking back after having arrived at the Lookout Hill.
Image credit: NASA/JPL-Caltech/areo.info/martiandennis
Image credit: NASA/JPL-Caltech/areo.info/martiandennis
The mule deer thrive on lab and regularly roam around from building to building. They are as iconic as the rovers and spacecrafts.
November 19, 2024 at 5:51 PM
The mule deer thrive on lab and regularly roam around from building to building. They are as iconic as the rovers and spacecrafts.
This was a picture of the lab that I took last week, a day before the layoffs. The following day was a tough one to endure. I wish all of my former colleagues great success in their next endeavor. They will be missed and their contributions will not be forgotten.
November 19, 2024 at 12:55 AM
This was a picture of the lab that I took last week, a day before the layoffs. The following day was a tough one to endure. I wish all of my former colleagues great success in their next endeavor. They will be missed and their contributions will not be forgotten.
Just a quick plug for Holger Isenberg's website areo.info/mars20/. I try to check it every day for the latest processed NavCam images of Mars. This particular one was taken on Sol 1332 (or 11/17/24) as the rover was traversing up the western end of Pico Turquino.
Image credit: Holger Isenberg
Image credit: Holger Isenberg
November 18, 2024 at 8:37 PM
Just a quick plug for Holger Isenberg's website areo.info/mars20/. I try to check it every day for the latest processed NavCam images of Mars. This particular one was taken on Sol 1332 (or 11/17/24) as the rover was traversing up the western end of Pico Turquino.
Image credit: Holger Isenberg
Image credit: Holger Isenberg
Hi new followers and welcome! I'm glad to see that we are getting critical mass of new adopters here. Just a self-introduction: I'm a systems engineer at NASA and I've worked on both Europa Clipper and the Perseverance Rover. Here's a picture of me in front of the rover when it was still on Earth. 🌎
November 14, 2024 at 11:11 PM
Hi new followers and welcome! I'm glad to see that we are getting critical mass of new adopters here. Just a self-introduction: I'm a systems engineer at NASA and I've worked on both Europa Clipper and the Perseverance Rover. Here's a picture of me in front of the rover when it was still on Earth. 🌎
The vibe on lab after the time change.
November 10, 2024 at 10:32 AM
The vibe on lab after the time change.
Happy Halloween and Happy 88th Birthday to NASA-JPL! 🎃
October 31, 2024 at 5:16 PM
Happy Halloween and Happy 88th Birthday to NASA-JPL! 🎃