avatars
Science Mission Directorate Digital Lead Tahira Allen poses for a portrait Wednesday, Feb. 8, 2023, at the Mary W. Jackson...
![](https://science.nasa.gov/wp-content/uploads/2024/08/cropped-cms-photo.jpg?w=4096&format=jpeg)
Mike Toillion, filmmaker for the NASA Astrobiology program, and creator of Our Alien Earth.
![A white man in his late 30's, wearing a light blue shirt featuring an astronaut in front of a moon, stands in front of a brick wall and looks off to the left.](https://science.nasa.gov/wp-content/uploads/2024/08/cropped-screen-shot-2023-01-18-at-10-40-45-am.png?w=4096&format=png)
![](https://science.nasa.gov/wp-content/uploads/2024/08/cropped-thumbnail-vtts-caelagpr-creditshoemaker.jpg?w=4096&format=jpeg)
![](https://science.nasa.gov/wp-content/uploads/2024/08/nasa-headshot.jpg?w=4096&format=jpeg)
![Alicia Cermak, JPL](https://science.nasa.gov/wp-content/uploads/2024/08/cropped-alicia-cermak.png?w=4096&format=png)
![](https://science.nasa.gov/wp-content/uploads/2024/07/cropped-lonnie-astro.jpeg?w=4096&format=jpeg)
![](https://science.nasa.gov/wp-content/uploads/2023/10/cropped-NASA_logo-e1714069174773.png?w=4096&format=png)
![](https://science.nasa.gov/wp-content/uploads/2024/04/cropped-helio-logo.png?w=4096&format=png)
![](https://science.nasa.gov/wp-content/uploads/2024/04/cropped-img-0318-96x96-1.webp?w=4096&format=png)
![](https://science.nasa.gov/wp-content/uploads/2024/03/cropped-chelsea-gohd.webp?w=4096&format=png)
Pat Brennan is a NASA science writer who specializes in exoplanet and Earth topics.
![A Hispanic man sits smiling in front of a darkly colored poster for Enceladus, a moon of Saturn.](https://science.nasa.gov/wp-content/uploads/2024/03/cropped-pat-brennan.webp?w=4096&format=png)
![Close-up of a smiling person, wearing a sun hat and eyeglasses, outdoors under a partly cloudy sky.](https://science.nasa.gov/wp-content/uploads/2024/03/cropped-barry-headshot-2023.jpg?w=4096&format=jpeg)
![NASA meatball logo/insignia](https://science.nasa.gov/wp-content/uploads/2023/04/cropped-cropped-meatball-1041-jpg.webp?w=4096&format=png)