How to Use a Planisphere

planisphere

We use constellations with signs of the zodiac or animals, because these are convenient easy ways of helping to remember where particular stars are. We name the constellations for the shapes their stars make when joined up. Cygnus is in the shape of a swan with wings outstretched, and Scorpius is shaped like a scorpion. Sometimes a shape will be part of a constellation, such as the seven bright stars in Ursa Major that form the saucepan and handle of the Big Dipper.

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Universe Today

Space and astronomy news

The microgravity in space makes astronauts' spines to elongate, causing back pain. A new SkinSuit being developed by the European Space Agency gives astronauts some relief.

The post Special Skinsuits Could Help Astronauts Avoid Back Pain When Their Spines Expand In Space appeared first on Universe Today.

Author: Evan Gough
Posted: February 23, 2018, 9:17 pm

NASA has released a mosaic image that shows exactly where the Cassini probe would crash into Saturn's atmosphere, mere hours before it did!

The post This was Exactly Where Cassini Crashed into Saturn appeared first on Universe Today.

Author: Matt Williams
Posted: February 23, 2018, 8:34 pm

The Eruption of Mount Sinabung on the island of Sumatra, Indonesia, was recently photographed from space by satellites belonging to NASA's Earth Observatory

The post Wow, Indonesia’s Mount Sinabung is Making a Mess. Here’s the View From Space! appeared first on Universe Today.

Author: Matt Williams
Posted: February 23, 2018, 7:26 pm

A team of ESA researchers recently tested a new type of shielding by firing an aluminum bullet at it and filming the results.

The post Spacecraft Shields Will Need to be Tough. Here’s an Aluminum Bullet Shattering a Shield at 7 km/s appeared first on Universe Today.

Author: Matt Williams
Posted: February 23, 2018, 5:53 pm

A recent study by an international team of scientists has indicated that there may be no connection between SMBHs and star formation in a galaxy.

The post Maybe There’s no Connection Between Supermassive Black Holes and Their Host Galaxies? appeared first on Universe Today.

Author: Matt Williams
Posted: February 22, 2018, 11:56 pm

After multiple delays, SpaceX’s PAZ mission launched from from Space Launch Complex 4 East (SLC-4E) at Vandenburg Air Force Base on the morning of Thursday, February 22nd. Shortly after it reached orbit, the rocket deployed its payload (the PAZ Earth Observing satellite) as well as and two Starlink demonstrations satellites that will test SpaceX’s ability […]

The post SpaceX Launches the First of Thousands of Space Internet Satellites, but Didn’t Quite Catch the Fairing appeared first on Universe Today.

Author: Matt Williams
Posted: February 22, 2018, 6:47 pm

In their latest attempt to reduce the costs of individual launches, SpaceX is looking to make their rockets payload fairings reusable.

The post Here’s How SpaceX is Planning to Recover Rocket Fairings: a Boat With a Net Called Mr. Steven appeared first on Universe Today.

Author: Matt Williams
Posted: February 22, 2018, 2:34 am

Astronomers with the Dark Energy Survey have discovered the most distant and ancient supernova yet: a rare Super Luminous Supernova about 10.5 billion light years away.

The post Astronomers Find The Most Distant Supernova Ever: 10.5 Billion Light-Years Away appeared first on Universe Today.

Author: Evan Gough
Posted: February 21, 2018, 11:39 pm

Hosts: Fraser Cain (universetoday.com / @fcain) Dr. Paul M. Sutter (pmsutter.com / @PaulMattSutter) Dr. Kimberly Cartier (KimberlyCartier.org / @AstroKimCartier ) Dr. Morgan Rehnberg (MorganRehnberg.com / @MorganRehnberg & ChartYourWorld.org) Special Guests: Dr. Jessie Christiansen is a Caltech staff scientist and co-founder (with UC Santa Cruz astronomer Dr. Ian Crossfield) of the citizen-scientist project Exoplanet Explorers which […]

The post Weekly Space Hangout: Feb 21, 2018: Dr. Jessie Christiansen and “Exoplanet Explorers” appeared first on Universe Today.

Author: Fraser Cain
Posted: February 21, 2018, 11:10 pm

Images released by NASA's Earth Observatory show how ice loss in the tropics is advancing, and how glaciers there will be gone within a decade.

The post Some of The Last Glaciers in The Tropics. They’ll be Gone in About a Decade appeared first on Universe Today.

Author: Matt Williams
Posted: February 21, 2018, 7:50 pm