Posts by 

Deborah Byrd

Bird ranges shifting northward: Audubon study

A new study from the National Audubon Society uses 90 years of Christmas Bird Count data. It shows bird ranges shifting northward.

New video: The 1843 Great Eruption of Eta Carinae

In 1843, the star Eta Carinae briefly became the one of the brightest stars in the sky. Then it faded. Astronomers call it the star's Great Eruption.

Sweden went 1st in banning aerosol sprays on January 23, 1978

Sweden 1st to ban aerosol sprays on this date in 1978. They were propelled by chlorofluorocarbons (CFCs), which harmed Earth's ozone layer.

Black holes devour stars. Do they also help stars form?

New data from the heart of dwarf galaxy Henize 2-10 suggest some black holes help create stars. They also bring light on how the first supermassive black holes formed.

Rolling stones on Mars, seen from orbit

Rolling stones on Mars. An image from the ESA/Roscosmos ExoMars Trace Gas Orbiter shows a cliff-face on Mars. Boulders have rolled down the cliff.

A gravitational wave background from giant black holes?

In its second data release in early January 2022, scientists with IPTA announced early glimpses of a gravitational wave background.

Shackleton expedition to magnetic south pole

On January 16, 1909, a team of Antarctic explorers thought they'd found the magnetic south pole. The magnetic south and north poles wander every year.

Huge Local Bubble drives formation of new stars

Our Local Bubble, a relative void in space filled with stars (but not much gas), was blown out by supernovae millions of years ago.

Our Milky Way’s central black hole flashes unpredictably

Our Milky Way's central black hole flares unpredictably, both day to day and also over the long term. Astronomers want to know why.

Moon and bright stars on January 12, 13 and 14

Look for the moon and bright stars on the evenings of January 12 to 14. You'll see the Pleiades and Aldebaran close by the waxing moon.

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