Dr. Sarah Biddle Leslie (she/they)

@extragalactic.bsky.social

1767 Followers 672 Following

Postdoctoral fellow at Center for Astrophysics | Harvard & Smithsonian | Space Art | Galaxy evolution | Mental health | Australian, disabled cat parent. Instagram: @Fashionableastronomy

Photo of the spine and back of the book.
Photo of a hand holding a book. The book has a dark background with half a red/orange spiral galaxy in the foreground. The title reads "The resolved lifecycle of metals and dust in nearby galaxies". The author is Stefan Anthony van der Giessen.
Text that reads, "International Virtual Course (IVC) 2026. International Virtual Course (IVC) 2026 – Southeast Asian STEM Through Astronomy Research (SEASTAR)." "This collaborative course and project, offered by ITB, CfA Harvard & Smithsonian, NARIT, Mahidol University, Universiti Malaya, and International Islamic University Malaysia, includes lectures on fundamental concepts, paper discussions, hands-on projects, and student presentations." Profiles of lecturers and mentors.
Digital art with a circular nebula in the center colored pink and blue. On top is a bird with an orange breast - about the same size as the nebula.
digital art with an orange, yellow gaseous background, a central pink elongated nebula, and a top right pink and blue circular nebula. Lanes of dark brown dust clouds are across the image.
Digital artwork depicting the Perseus galaxy cluster as a swirling, abstract formation. A bright white core is surrounded by turbulent, filament-like structures in shades of green, blue, and soft white, suggesting the presence of radio halos. The outer edges blend into a glowing green aura, evoking the sense of motion and energy from cosmic turbulence. The image symbolizes the invisible structures seen in low-frequency radio observations of galaxy clusters.
Back cover of a PhD thesis featuring a background of real LOFAR decameter-wavelength radio data in dark green tones, overlaid with four bright blue-white objects representing active galactic nuclei (AGN). These AGN appear as luminous, irregularly shaped sources with glowing cores and faint jets, distributed across the frame. The background is textured with starburst-like calibration artifacts centered on numerous faint point sources.
Cover of a PhD thesis titled "Galaxy Clusters in the Decameter Sky" by Christian Groeneveld. The background features real decameter-wavelength radio data in glowing green tones, filled with faint point-like sources. At the center is an abstract, swirling digital illustration representing the Perseus galaxy cluster, with luminous filaments and a bright central core, evoking the turbulent energy of radio halos.
painting of the pillars of creation in visible light. The 3 pillars are dark brown and block the light.
painting of the pillars of creation in visible light. The 3 pillars are dark brown and block the light.
painting of the "pillars of creation". The three pillars are brown, but also have red and yellow colours
painting of the "pillars of creation". The three pillars are brown, but also have red and yellow colours
Photo of painting of the full moon. Square black canvas.
Photo of a square canvas surrounded by fairy lights. On the canvas is the artwork of the witch head nebula.
Photo of a painting of a planet with gold, red, white, hues on a square canvas. Stars in the background.
Photo of a painting showing two spiral galaxies merging
Digital art: black background and a turquoise egg shaped nebula with pink in the centre and some dark cloudy dust lanes across it. A few stars spattered across the image.
Photo of Marta holding her thesis
Digital art of two merging galaxies. The top galaxy looks like a penguin with its beak pointing left and the bottom left galaxy looks smooth and round like an egg.
Photo of a painting with a star on the left and two planets on the right.
Colourful painting of a nebula
Photo of a painting of a nebula
Colourful painting of a galaxy on a square canvas
A painting of a heart made of two galaxies merging.
Painting of an eye-like nebula with outer layers in red and inner area in blue. Photographed on a wooden bench
Digital art showing a blue nebula (top), red (right), and yellow (bottom) with stars at their centre and dust lanes connecting them. Many sma stars are in the background. And a globular cluster is bottom right.
Digital space art - a bright young star at the top, surrounded by gas, a star cluster in the middle, and the cone nebula at the bottom.
Digital artwork. A constellation of white stars, with the main stars connected by cyan line. Dark blue clouds behind the stars on top of a white background.
Photo of painting of Andromeda Galaxy
Digital painting of a nebula. Gas and dust clouds in red and many stars across the background in blues, cyans, whites, yellow and red.
Digital art of the horsehead nebula
Acrylic painting of the emu in the sky, showing dark dust patches on the Milky Way
Image of digital artwork. Mars on a black background.
Photo of a canvas with a black background and a spiral galaxy painted in white, pink, yellow blue
Image of digital artwork showing a colourful nebula
Image of digital artwork of the sun. Black background, orange and red solar surface showing flares.
Image of artwork: pulsar wind nebula
Painting of star cluster, white/ blue stars and gas