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Latest Articles

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A Dyson sphere megastructure enclosing a star to capture its energy
What Is a Dyson Sphere? The Ultimate Alien Megastructure
Astrobiology Space Science
8 Min
Dark forest theory: a silent forest of trees beneath a sky full of stars
The Dark Forest Theory: Why the Universe Is Silent
Astrobiology Space Science
8 Min
Macro view of a back illuminated sensor — the bare CMOS die of an astronomy camera with gold bond wires and a star field reflected in its cover glass
BSI vs FSI: How Back-Illuminated Sensors Changed Astrophotography Cameras
Astrophotography Cameras & Sensors
9 Min
Quantum efficiency curve for astronomy cameras, comparing a back-illuminated CMOS sensor peaking near 91% with an older front-illuminated CCD near 52%.
Quantum Efficiency in Astronomy Cameras: What QE Really Buys You
12 Min
The Great Filter question visualized by the surface of Mars, where we search for whether life passed the first step
The Great Filter: The Barrier That Could Explain the Silence
8 Min
The habitable zone diagram showing the Goldilocks zone around a star where liquid water can exist
The Habitable Zone: Where Life Could Exist in Space
8 Min
Star chart of the Perseus constellation showing Mirfak, Algol the Demon Star, the Double Cluster and the Perseid radiant
Perseus Constellation: How to Find the Hero, Algol & the Double Cluster
8 Min
The Kardashev scale: Earth's city lights showing humanity's planetary energy use
The Kardashev Scale: Types of Civilizations Explained
9 Min
Diagram of how a reflection nebula glows blue as dust scatters a nearby star's light
Reflection Nebula: Why These Dusty Clouds Glow Blue
10 Min
The Drake equation illustrated by the Green Bank radio telescope used to search for alien civilizations
The Drake Equation: How Many Alien Civilizations Exist?
8 Min
Star map of the Orion constellation with its main stars and Orion's Belt labeled
The Orion Constellation: Stars, Belt, and How to Find It
10 Min
The Fermi paradox: radio antennas listening for alien signals beneath the Milky Way
The Fermi Paradox Explained: Where Is Everybody?
9 Min
A Muslim astronomer of the Islamic Golden Age charting the stars by candlelight with a brass astrolabe and celestial globe
Astronomers
Famous Muslim Astronomers: 12 Pioneers Who Shaped the Sky
10 Min
Painterly banner of Al-Biruni, the medieval Persian astronomer, measuring a star chart with brass dividers by lamplight in his study
Astronomers
Al-Biruni: The Medieval Genius Who Measured the Earth
9 Min
Redshift concept diagram: a galaxy's spectral lines shifted toward the red end of the spectrum
Redshift and Blueshift: How Light Reveals an Expanding Universe
11 Min

Astronomers

Explore all in Astronomers
A Muslim astronomer of the Islamic Golden Age charting the stars by candlelight with a brass astrolabe and celestial globe
Astronomers
Famous Muslim Astronomers: 12 Pioneers Who Shaped the Sky
10 Min
Painterly banner of Al-Biruni, the medieval Persian astronomer, measuring a star chart with brass dividers by lamplight in his study
Astronomers
Al-Biruni: The Medieval Genius Who Measured the Earth
Men in Astronomy
9 Min
Painterly portrait of Henrietta Swan Leavitt examining photographic plates at Harvard
Astronomers
Henrietta Swan Leavitt: Measuring the Universe (2026)
8 Min
Painterly portrait of Vera Rubin at a telescope with a galaxy rotation-curve backdrop
Astronomers
Vera Rubin: The Astronomer Who Proved Dark Matter (2026)
8 Min
Painterly portrait of Hypatia of Alexandria with an astrolabe under the night sky
Astronomers
Hypatia of Alexandria: Astronomer and Mathematician
8 Min
Painterly portrait of Richard Feynman at a chalkboard of particle-path diagrams
Astronomers
Richard Feynman: The Great Explainer of Physics (2026)
8 Min

Astrophotography

Explore all in Astrophotography
Macro view of a back illuminated sensor — the bare CMOS die of an astronomy camera with gold bond wires and a star field reflected in its cover glass
BSI vs FSI: How Back-Illuminated Sensors Changed Astrophotography Cameras
Astrophotography Cameras & Sensors
9 Min
Quantum efficiency curve for astronomy cameras, comparing a back-illuminated CMOS sensor peaking near 91% with an older front-illuminated CCD near 52%.
Quantum Efficiency in Astronomy Cameras: What QE Really Buys You
Astrophotography Fundamentals Astrophotography
12 Min
La Silla Observatory in Chile under a starry sky, a high, dry site with excellent astronomical seeing
Telescope Resolution and Astronomical Seeing: The Limits of Sharpness
8 Min
A German equatorial telescope and camera rig used to capture calibration frames in astrophotography
Calibration Frames in Astrophotography: Darks, Flats & Bias Explained
9 Min
Astrophotography under light pollution: a starry night sky glowing above a city skyline
Light Pollution Astrophotography: How to Beat City Skyglow
9 Min
Pixel scale in astrophotography — how a telescope and camera sample the sky
Best Pixel Scale Explainer (arcsec/pixel) — 2026 Beginner’s Guide
9 Min