Pluto Essay Example | Topics and Well Written Essays - 750 words

Pluto - Essay Example Pluto has five moons which are Charon, Hydra, Nix, Kerberos, and Styx and there are believed to be many other smaller moons some which have been discovered and others which have not yet been discovered. Charon which is the largest was also discovered first in 1978 followed by Hydra and Nix which were both discovered in 2005. The discovery of these moons suggests that the planet may be having a ring system though past studies show that no ring exists on the planet or on its periphery. It is also worth noting that these moons are unusually close to the dwarf planet than all other objects that surround it and also then it is the case in the majority of other planets which have been explored. The origin and the identity of Pluto are not very clear and there are actually many differing theories all of which try to explain these two aspects. Some of these theories suggest that the planet used to be a moon of the neighboring planet Neptune that escaped from the normal path of circulation he nce resulting to a new planet. Other theories differ with this and argue that the paths of the two planets are far away from each and thus there is no possibility of the two colliding. There is a lot to be explored on Pluto and therefore the possibility of a spacecraft landing on the planet this year is expected to be of great benefit as far as studies concerning the planet are concerned. There is, therefore, need for more studies and visits to be launched in order to solve all the mysteries surrounding the planet.

Occupational Health and Safety Essay Example | Topics and Well Written Essays - 2500 words

Occupational Health and Safety - Essay Example 1) Falls and Trips: Falls and trips could occur while working on ladders, scaffolding, roofs, mobile elevating work platforms, or any other form of working at heights. 23 worker deaths in construction resulted from falls from heights in 2006-2007. Use of fall protection equipment such as work restraint systems, work positioning systems, rope access systems, or fall arrest systems can minimize falls and trips. 2) Workplace Transport Accidents: Accidents involving workplace vehicles cause fatalities every year. Accidents could include being struck by a moving vehicle, falling from a vehicle, materials falling from a vehicle, collapse/overturn of a vehicle, or hit against a vehicle. There were 66 workplace transport fatalities in 2006-2007. Planning, training, awareness, and appropriate use of vehicles can reduce accidents. 1) Asbestos: Inhaling asbestos fibres can cause mesothelioma, lung cancer, asbestosis, and/or pleural thickening. 1000 people who worked in building or maintenance die every year from lung cancer. Training and personal protective equipment is required for working with asbestos containing material. 2) Noise: Exposure to high levels of noise (over 85dBA) for over long periods of time can cause noise induced hearing loss. Use of hearing protective devices is necessary to keep noise exposure to acceptable levels. Exposure to noise can also be reduced by use of engineering or administrative controls. 3) Musculoskeletal Disorders (MSDs): Repetitive manual handling of heavy weights create excessive stress and strain on the body, and may lead to musculoskeletal disorders. Manual Handling Operations Regulations 1992 have been developed to reduce MSDs in construction work. Health and Safety Executive. (2008). Work-related injuries and ill health in construction - Summary. Retrieved March 2, 2009, from Health and Safety Executive Web site: