Warmhole -Space Talks#7

A highly speculative idea of modern astrophysics, warmholes are theoretical possibilities allowed within the mathematical framework of Einstein's general theory of relativity. A warmhole is a short-lived portal, lasting only a brief moment, that joints two black holes in different locations.

Warmhole

Warmholes could connect two points in the present-day universe or, perhaps, in different times. In warmhole theory, matter falling into a black hole at one point should emerge through a proposed "White Hole"-- the reverse of a black hole-- at the other end (Travelers could go from point to point in time or space through warmholes, as imagined here in the picture).
Neither wormholes nor any evidence of them has yet observed. Scientists cannot determine how they would be created, although astrophysics such as Hawking continue to work on this intriguing notion.

The Zodiac -Space Talks#6

The Zodiac is a band of constellations that extends roughly nine degrees on each side of the ecliptic, the sun's apparent yearly path through our sky.

Constellations of the Zodiac

Ancient Greek astronomers divided the zodiac into 12 parts. Over time, Earth's slight rotational wobble has shifted the ecliptic by more than 30 degrees against the backdrop of stars. The 18-degree-wide now also includes parts of Cetus (the Whale) and Orion (the Hunter).
Constellations seen from the Northern Hemisphere became standardized through the observations of ancient Western and Middle Eastern cultures. Those of the Southern Sky were named mostly by European ocean voyagers.

Constellations -Space Talks#5

Stars seem to move across the sky through the night, but that movement is due to Earth's rotation. As Earth spins on its axis, objects appear to rise in the east and set in the west. In the Northern Hemisphere, some stars never appear to  set, called Circumpolar Stars, they circle at a point projected in the sky above the Northern Pole near Polaris, the Pole Star. A corresponding situation exists above the South Pole near the Star Sigma Octantis.

Constellations

In ancient cultures, sky-watching played an important role in navigation, agriculture, religion and even entertainment. Those who observed the heavens connected stars to form patterns that related to the heroes, gods and legends of their culture-- what we refer to today as Contellations.

Most cultures named constellations and attached cultural meaning to their patterns. Native American sky lore, for instance, often used constellations to teach moral lessons.

Today, the Western world acknowledges the constellations that originated in Mesopotamia more than 5,000 years ago. Babylonian, Egyptian, and Greek astronomers also made contributions during the classical ages of their cultures.

In 1928 the International Astronomical Union (IAU) determined which constellations would be officially recognized. Of the 88 constellations on the IAU list, 48 were identified in ancient times with just the naked eye. The remaining 40 were added in more recent centuries.