EarthSky News - Oct 29 - Did Ceres Once Have an Ocean?

October 29 Did Ceres Once Have an Ocean? by:

Did Ceres once have an ocean? If it existed, what happened to it? And could Ceres still have liquid water today? Tonight … Perseus the Hero and a Demon Star Algol means head of the demon. Point out this star to your friends this Halloween. Fornax Galaxy Cluster reveals its secrets This new 2.3-gigapixel image of the Fornax Galaxy Cluster - one of the largest images ever released by European Southern Observatory - might make you feel small. How do human genes act in space? "Looking at gene expression ... we really see an explosion, like fireworks taking off, as soon as the human body gets into space."

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Tonight … Perseus the Hero and a Demon Star Algol isn't Perseus' brightest star, but it's probably its best known star. Algol is easy to spot in a dark-enough sky.

Photos: Observe the Moon Night Last night was International Observe the Moon Night, and EarthSky community members from around the world sent photos, reminding us that we all see the same moon. This shot is from Talha Zia of Karachi, Pakistan.   Submit your photo to EarthSky here!

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EarthSky News - Oct 28 - Moon Night, Top Stories

October 28 Moon Night Top Stories by:

Tonight … International Observe the Moon Night A global, public event coming up on October 28. Click in for links to events near you, and to learn how to participate online. Wayward moon receding from Earth The moon is getting steadily farther from Earth - year by year - at the rate of about 1.5 inches (3.8 cm) per year. That's about the rate that your fingernails grow. Astronomers confirm Earth has an asteroid buddy It's a small asteroid called 2016 HO3. It travels along with Earth in orbit around the sun. How the universe creates gold Scientists have seen it created in the cosmic fire of 2 colliding stars via gravitational waves. A potential human habitat on the moon? New study says this underground lava tube is large enough to house a city. Alligators eat sharks Jaws beware! Alligators might be coming for you. How cold and wet in the US this winter? La Niña (or not) is the biggest wildcard in how this year’s winter might shape up.

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Tonight's moon is in a waxing gibbous phase Simulated image of the waxing gibbous moon of October 28, 2017. Click here to simulate the moon phase for any date, via the U.S. Naval Observatory. Click here to learn about the moon's increasing distance from Earth.

Reliving Cassini's final moments This is the Cassini spacecraft's last full view of Saturn on September 13, 2017. Space engineers have reconstructed what happened to Cassini as it plunged into the planet last month. Submit your photo to EarthSky here!

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