Cassini’s final closest approach to Saturn’s moon Titan is scheduled for April 21 at 11:08 p.m. PDT (2:08 a.m. EDT or 6:08 UTC on April 22).
Artist's concept of the Cassini spacecraft and Saturn's large moon Titan. Image via NASA/JPL-Caltech.
The glorious Cassini spacecraft – now nearly out of fuel – will make the 1st in a daring series of dives through the gap between Saturn and its rings on April 26.
Image via NASA
During Cassini’s close pass of Titan on April 21-22, Titan’s gravity will bend Cassini’s orbit around Saturn, shrinking it slightly, so that instead of passing just outside the rings, the spacecraft will begin its Grand Finale dives just inside the rings. Wow!
Spica, the brightest star in the constellation Virgo, is a whirling double star. How to see it in your sky.
People traveling in airplanes often see glories. The sun has to be behind your head. You’ll see the plane’s shadow cast on a cloud, surrounded by a halo of light.
Photo by Gowrishankar Lakshminarayanan.
The European Space Agency is monitoring the progress of the crack in Antarctica’s Larsen-C ice shelf. The crack is eventually expected to produce a massive iceberg.
Controversy surrounds construction of hydropower stations on a river that feeds deep, ancient Lake Baikal.
Large asteroid 2014 JO25 safely passed Earth on April 19, 2017 at some 1,098,733 miles (1,768,239 km) or about 4.6 times the distance from Earth to the moon. Images from the EarthSky community here.
A closely cropped view of galaxy M64 and asteroid 2014 JO25, sweeping along in front of the field of view, by Mario Rana in New Mexico, April 19, 2017.
It’s coming closer today than any asteroid this large since 2004. It came into view of small telescopes a few hours ago. Early radar observations indicate it’s bigger than we thought.
Early radar observations of asteroid 2014 JO25 using the Arecibo Radio Telescope indicate that the asteroid is double-lobed about about 0.8 miles (1.3 km) long. Image via Planetary Radar Science Group.