All about moonbows
By: Jose Juan Gutierrez
A moonbow is produced by the refraction of moonlight off moisture contained in the atmospheric air, and can only be seen when sunlight is reflected off the surface of the moon. A moonbow is relatively faint due to very small amounts of light that are...
The future prospects for ion-propelled space rockets
By: D. Vogt
The ion thruster, which uses electrical power from solar panels to power a rocket firing an ion beam instead of one that burns solid or liquid fuel, is an old idea which has become increasingly influential in recent years thanks to technological advances. The prospects...
By: Retha Boswell
Neptune is the eighth planet from the sun and has some of the most violent weather in the Solar System. Neptune's atmosphere has a lot in common with the atmospheres of all of the large gas planets in the Solar System, but it has a...
By: Cynthia Astle
In a Hollywood movie, a few brave astronauts can fly to an object bearing down on Earth to set off bombs and explode the menace before it hits this planet. In reality, however, huge asteroids like the ones that passed close to the planet in...
By: Robin Lamb
Fifty years ago this month, a former textile factory worker named Valentina Tereshkova became the first woman to fly in space. 26-year-old Valentina was selected from more than 400 applicants because of her skill and experience as a parachutist, and because her father had been...
By: D. Vogt
Today, Italian scientist Galileo Galilei is mainly remembered for his perfection of the telescope and discovery of the four largest moons of Jupiter. However, in his astronomical observations, Galileo also made an important contribution to the development of deductive reasoning during the 17th century. Debates...
By: Dr. Bryan Katz
Most people have heard of the Hubble Space Telescope (HST), but relatively few people are familiar with the astronomer after whom it was named. Edwin Hubble (1889-1954) was a key figure in 20th-century astronomy, so much so that not only was a space telescope named...
By: D. Vogt
In early 2013, scientists working in a research centre installed in an old mine in Minnesota announced important progress in the ongoing search for one of the most elusive substances in the universe - dark matter. The scientists in question are with the Cryogenic Dark...
By: D. Vogt
Gravitational lensing is the process by which light travelling from a distant source seems to "bend" or curve around extremely dense objects that lie between the light source and the observer. It is an extremely important aspect of modern astronomy because the gravity of a...
The search for galactic dark matter in a Minnesota mine
By: Michael Prather - 660563
It’s no secret that the universe is expanding. Astronomers wonder if, at some distant point in the future, the universe will cease to expand and begin contracting. The problem is that there isn’t enough matter in the universe to prevent it from expanding...

 

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