
A Puzzle Solved?
A New and Promising Interpretation of the Old Problem of the Solar Corona

A Puzzle Solved?
A New and Promising Interpretation of the Old Problem of the Solar Corona

Wartime Astronomy
A Mere War Does Not Sidetrack European Astronomers from Regular Work

The Shape of the Earth
New Determination of Its Polar Flattening, with a Saner Proposal for Submarines

A Strange Picture
Chairman of the Department of Astronomy and Director of the Observatory at Princeton University. Research Associate of the Mount Wilson Observatory of the Carnegie Institution of Washington

Inside the White Dwarf Stars
How an "Absurdity" Became a Discovery, Revealing a New State of Matter

A New Tool for Science
A Noteworthy New Atlas Shows Astronomers What the Solar Spectrum is Really Like

Sun-Spot Distribution
What Had Seemed to be an Anomaly Proves to be an Optical Effect with Odd Cause

The Brightest Known Star
Recent Search Reveals a Star Shining at Least 45.000 Times Brighter than Our Sun

What is on Venus?
Newest Evidence Hints Venus is Clothed In Dense Clouds of Polyoxymethelene Hydrates

The Origin of the Earth
Astrophysicists Still Are Unable to Solve This Near-at-Home Problem with Finality

How Big Does the Mood Look?
In Which it Turns Out that Astronomy Has Something to Learn from Psychology

Interstellar Gas
More and More, Astronomers are Finding Matter as Particles Between the Stars

An Ideal Experiment
Taking the Moon's Temperature During an Eclipse Reveals a Phenomenally Big Drop

Bleak Black Ball of Rock
After Ten Years the Planet Pluto's Mass Has Been Determined, Denser, Darker, More Massive than Was Expected, Laborious Computations

What Causes Magnetic Storms?
Not Sun-Spots but Gases Erupted from the Sun and Traveling to Earth at Times of Solar Turmoil, Sun-Spots May but Need Not Accompany This

Even the Earth Errs
Man's Most Accurate Clock is the Rotating Earth but the Earth Goes Fast and Slow ... Science Must Keep Eternal Watch on its Subtle Changes

Stars That Have Chemistries
Certain Classes of Stars Have Atmospheres Like the Familiar Oxidizing and Reducing Atmospheres of the Chemical Laboratory

A Famous Theory Weakens
The Encounter Theory of the Origin of Planets Has Now Become Shaky and May Pass into the Limbo Where the Old Nebular Hypothesis Went

Algol's Eclipses

Dust Clouds of Space

What's Inside the Stars?
Most of Our Present Knowledge of the Composition of the Stars Concerns Only their Atmospheres, Now the Analytical Boring Machine Digs Deeper

Eclipsing Binaries
A Striking Example of the Extent to Which the Astronomer, Armed with but a Few Observational Data, Can Sometimes Go in Unraveling Puzzles

Our Galaxy Re-Measured
Galactic Rotation Efects, Interstellar Absorption and Certain Dynamical Constants of the Galaxy Have Been Determined from Cepheid Variable Stars

A Remarkable Triple Star
How the Spectroscope, Working on a Star Whose Secrets the Telescope Does not Reveal, Afords a Striking Abundance of Detailed Facts