Earth Venture program

NASA Announces 5 New Earth Venture Missions

Investigating and then understanding fundamental processes that impact humanity and the environment are crucial aspects of research for NASA and the scientific community. The data and information collected from these missions, plus the unique vantage…

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Conjunction

Conjunction: An Introduction

In astronomy, a conjunction occurs when two astronomical objects or spacecraft have either the same right ascension or the same ecliptic longitude, usually as observed from Earth. Times and details depend only very slightly on the observer’s location on the…


The Big Bang Theory

The Big Bang theory is a cosmological model for the observable universe from the earliest known periods through its subsequent large-scale evolution. The model describes how the universe expanded from a very high-density and high-temperature state, and offers a comprehensive explanation for a broad range of phenomena,…


quasars

Quasars: What Are They?

The term quasar or quasars originated as a contraction of quasi-stellar radio source, because they were first identified during the 1950s as sources of radio-wave emission of unknown physical origin. It was first used in a paper by  astrophysicist Hong-Yee Chiu in…


Messier 19

Messier 19

The stars in globular clusters orbit about a common center of gravity, so these clusters are usually spherical. Some globular clusters, like Messier 19, have a slightly elongated shape. This cluster is only 6,500 light-years…


Penumbral Lunar Eclipse Lunar Calendars

November 30 – Penumbral Lunar Eclipse

As mentioned in the lunar eclipses article, a penumbral lunar eclipse occurs when the Moon passes through the Earth’s partial shadow, or penumbra. During this type of eclipse the Moon will darken slightly but not…


Model Rockets

Model Rockets

Many people are interested in model rockets, but what are they exactly? How do they vary and how did model rockets become so popular? A model rocket is a small rocket designed to reach low altitudes and be recovered by a…


Messier 18

Messier 18

It looks like Messier 18 might very well be a binary cluster that is paired with NGC 6618. NGC 6618 located inside Messier 17. Messier 18 is a relatively dim open star cluster located in…



Rings of Saturn

The Rings Of Saturn

The rings of Saturn are arguably one of the most recognizable features of a planet in the entire solar system, other than Jupiter’s Great Red Spot. Amateur astronomers are amazed at the first time that…


Messier 17 Omega Nebula

Messier 17 Omega Nebula

Messier 17 is the star-forming nebula that is more famously known by its nicknames as the Omega Nebula, Swan Nebula, Checkmark Nebula, or Horseshoe Nebula. Located in the Sagittarius constellation, M17 is a very beautiful nebula…