Astronomy news

Kech Cosmic Re-ionization Mapper

At ... on the 'things are getting interesting' cavalcade this one is worth looking at. The Keck Cosmic Web Imager (KCWI) has been operative since September (2017) and detects light in the blue spectrum, or pattern of the visible wavelength. KCWI has been quite successful to date. However, when the second part of the project takes off, the Kech Cosmic Re-ionisation Mapper, it will map emissions of hydrogen at 'very high red shifts' in order to understand the environments of the first stars that formed.

Gravity Speed of Light

Jovan has sent in a lot of links this week. Here are two of them. At .... why does gravity travel at the speed of light. This idea is derived from the recent gravitational waves generated from a collision of two stars, 130 million years of age - in a far away galaxy. They reached the Earth in August 2017. These were neutron stars and the collision caused a gravitational wave - but gravity appears to have traveled at the same speed as light emitted from the same collision.

Fault on Mars

Robert sent in a number of links on the same subject - geology on Mars. More specifically, a so called fault line. See for example ... NASA reveals a stunning image from Mars. Robert asks, but is it all what it seems, a fault line.

Why iron meteorites make landfall but chondrites explode

Why iron meteorites reach the surface of the Earth but chondrites and conglomerate meteors tend to explode in the atmosphere - breaking into many pieces and leaving small scatters on the surface. It's all to do with air penetrating cavities in rocky meteorites causing them to weaken and explode apart. In other words, our atmosphere naturally protects the surface from the hazard of real meteorites - but there are always exceptions to the rule. Large chondrites have the ability to penetrate much closer to the surface - or even reach the surface.

Red Spot

Jovan sent in the links below - ... and ... data collected by NASAs Juno spacecraft indicates that the great red spot penetrates deep below the upper atmosphere of Jupiter. The red spot is a giant oval of crimson coloured clouds that race counter clockwise around the perimeter of the anomaly ....

Earth and Venus

Jovan sent in this link - ... why is Earth magnetised but Venus is not magnetised. It seems planetary scientists don't really know what to make of Venus, an admission in a popular magazine available for sale in newsagents. It is in many ways similar to the Earth in matters os size, mass, and rocky composition - but worlds apart in other ways. In atmosphere for example. Venus is cl;oud rich and dense. Surface temperatures are around 460 degrees celsius.

Weak Black Holes

It seems like black holes are not living up to the hype surrounding them as the magnetic field of one is much less powerful than envisioned in the various mainstream models of the phenomenon - see ... we are told reality is catching up with black holes. In a paper in Science journal we learn they have significantly weaker magnetic fields than previously thought - code for, oh dear, measurement doesn't match theory. In fact the actual energy around a black hole is 400 times lower than entrenched in mainstream thinking.

Remodelling the Moon

Gary also sent this link at ... (see also ). Collisions 'after' the formation of the Moon 'remodelled' early Earth - all by using modeling processes (see Naturegeoscience at www ). Basically, they have used computer simulation fo show the Earth could have been transformed by small planet sized asteroids after the collision that created the Moon.

Robust Rebuttal

Physicists did not like Andre Meader's claim that dark matter and dark energy do not exist - see News item at ... Maeder's argument was published in a series of papers in The Astrophysics Journal (during 2017) which did away with the necessity of factoring in hypothetical dark matter and dark energy, by the simple expedient of re-evaluating Einstein's concept of space time. Maeder found he could explain the expansion of the universe without dark energy.

Electrified Comets

At ... by Hannes Tager. This is the fourth in the series as the electric comet hypothesis is discussed in relation to what scientists over the last couple of centuries have been suggesting in contradiction of mainstream. This was not just in the 19th century, when the science was more open to a wider range of ideas but also in more recent years, even during the 20th century when the consensus dominated research and published articles.